Alle afleveringen van Discovery – pagina 11 van 18

Oxygen: The breath of Life

1 augustus 2017 · 27 min

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Oxygen appeared on Earth over two billion years ago and life took off. Now it makes up just over a fifth of the air. Trevor Cox, professor of acoustic engineering at the University of Salford, England, tells the story of oxygen on Earth and in space. Lees meer

Without oxygen, there would be no life on Earth, yet it was not discovered until late in the 18th Century. During the Great Oxidation Event, three billion years ago, cyanobacteria, thought to be the earliest forms of life on our planet, started to photosynthesise and these tiny creatures were responsible for putting the oxygen into our atmosphere, so we can breathe today. But it is not just for breathing. Ozone is three atoms of oxygen, and when it is in the stratosphere it stops harmful UVB rays from the sun reaching us. And if we are ever to leave our home planet, we will need to find a way to generate enough oxygen to keep us alive.

Trevor visits the Science Museum in London, to discover how astronauts on the space station get their oxygen. Trevor Cox is not only an acoustic engineer, he also plays the saxophone. When he finds out the role that oxygen, in the air, has on the sound of his playing he gets a surprise.

(Photo: Hovering clouds near Nagqu, approx 4,500 meters above sea level, north of Lhasa on the Tibetan plateau. Credit: Frederic J Brown/ AFP/Getty Images)

Mercury - Chemistry's Jekyll and Hyde

24 juli 2017 · 31 min

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The most beautiful and shimmering of the elements, the weirdest, and yet the most reviled. Lees meer

Chemist Andrea Sella tell the story of Mercury, explaining the significance of this element not just for chemistry, but also the development of modern civilisation.

It's been a a source of wonder for thousands of years - why is this metal a liquid? and what is its contribution to art, from the Stone Age to the Renaissance?

We look at how Mercury is integral to hundreds of years of scientific discoveries, from weather forecasting to steam engines and the detection of atomic particles it has a key role.

However Mercury is highly toxic in certain forms and ironically the industrial processes it helped create have led to global pollution which now threatens fish, wildlife and ourselves.

We ask is it time to say goodbye to Mercury?

Picture: Hg, mercury metal drops, credit: AlexeyVS/Getty Images

Eating Well in Lyon: Healthy Diets to prevent Bowel Cancer

17 juli 2017 · 27 min

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Anu Anand is in Lyon, looking at what we eat and drink and the risk of bowel cancer

Catching Prostate Cancer Early in Trinidad

10 juli 2017 · 27 min

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Anu Anand on detecting and treating prostate cancer in Trinidad and Tobago.

The USA’s Deadly Racial Divide: Black Women & Breast Cancer

3 juli 2017 · 26 min

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Anu Anand explores why more black women are more likely to die of breast cancer in the US

Screening and Treating Cervical Cancer in Tanzania

26 juni 2017 · 26 min

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Anu Anand on how vinegar and a head torch are used to tackle cervical cancer in Tanzania

Taking On Tobacco - Lung Cancer in Uruguay

21 juni 2017 · 26 min

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For more than 65 years we have known that smoking kills. So how can it be that a Mexican wave of tobacco use, disease and death is heading at breakneck speed towards the world’s poorest people? Millions will die of lung cancer and it is hard to grasp that this is a largely preventable disease. Lees meer

Uruguay in South America could hold the key to breaking this wave. Under a President who is a cancer specialist they introduced some of the most radical tobacco control policies in the world and attracted the wrath of corporate tobacco giant, Philip Morris, in the process. Anu Anand reports on Uruguay’s crusade to save its citizens.

Image: Roberto, life long smoker who has lung cancer
Credit: Anu Anand

Dying in Comfort in Mongolia

16 juni 2017 · 26 min

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The Mongolian matriarch who is helping people with terminal liver cancer die in comfort

Can Robots be Truly Intelligent?

5 juni 2017 · 27 min

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From Skynet and the Terminator franchise, through Wargames and Ava in Ex Machina, artificial intelligences pervade our cinematic experiences. But AIs are already in the real world, answering our questions on our phones and making diagnoses about our health. Adam Rutherford asks if we are ready for AI, when fiction becomes reality, and we create thinking machines. Lees meer

Robots - More Human than Human?

29 mei 2017 · 27 min

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Robots are becoming present in our lives, as companions, carers and as workers. Adam Rutherford explores our relationship with these machines. Have we made them to be merely more dextrous versions of us? Why do we want to make replicas of ourselves? Should we be worried that they could replace us at work? Is it a good idea that robots are becoming carers for the elderly? Lees meer

Adam Rutherford meets some of the latest robots and their researchers and explores how the current reality has been influenced by fictional robots from films. He discusses the need for robots to be human like with Dr Ben Russell, curator of the current exhibition of robots at the Science Museum in London. In the Bristol Robotics Laboratory Adam meets Pepper, a robot that is being programmed to look after the elderly by Professor Praminda Caleb-Solly. He also interacts with Kaspar, a robot that Professor Kerstin Dautenhahn at the University of Hertfordshire has developed to help children with autism learn how to communicate better.

Cultural commentator Matthew Sweet considers the role of robots in films from Robbie in Forbidden Planet to the replicants in Blade Runner. Dr Kate Devlin of Goldsmiths, University of London, talks about sex robots, in the past and now. And Alan Winfield, Professor of Robot Ethics at the Bristol Robotics Laboratory, looks ahead to a future when robots may be taking jobs from us.

Image; BBC ©

History of the Rise of the Robots

22 mei 2017 · 27 min

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The idea of robots goes back to the Ancient Greeks. In myths Hephaestus, the god of fire, created robots to assist in his workshop. In the medieval period the wealthy showed off their automata. In France in the 15th century a Duke of Burgundy had his chateau filled with automata that played practical tricks on his guests, such as spraying water at them. By the 18th century craftsmen were making life like performing robots. In 1738 in Paris people queued to see the amazing flute playing automaton, designed and built by Jacques Vaucanson. Lees meer

With the industrial revolution the idea of automata became intertwined with that of human workers. The word robot first appears in a 1921 play, Rossum's Universal Robots, by Czech author Carel Chapek.

Drawing on examples from fact and fiction, Adam Rutherford explores the role of robots in past societies and discovers they were nearly always made in our image, and inspired both fear and wonder in their audiences. He talks to Dr Elly Truitt of Bryn Mawr College in the US about ancient and medieval robots, to Simon Shaffer, Professor of History of Science at Cambridge University and to Dr Andrew Nahum of the Science Museum about !8th century automata, and to Dr Ben Russell of the Science Museum about robots and workers in the 20th century. And Matthew Sweet provides the cultural context.

Picture credit: BBC

Quantum Supremacy

15 mei 2017 · 28 min

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IBM is giving users worldwide the chance to use a quantum computer; Google is promising "quantum supremacy" by the end of the year; Microsoft's Station Q is working on the hardware and operating system for a machine that will outpace any conventional computer. Roland Pease meets some of the experts, and explores the technology behind the next information revolution. Lees meer

Picture: Bright future for Quantum Computing, credit: Jonathan Home @ETH

Re-engineering Life

8 mei 2017 · 27 min

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Synthetic biology, coming to a street near you. Engineers and biologists who hack the information circuits of living cells are already getting products to the market. Roland Pease meets the experts who are transforming living systems to transform our lives. Lees meer

Picture: MIT spinout Synlogic is re-programming bacteria found in the gut as "living therapeutics" to treat major diseases and rare genetic disorders, courtesy of Synlogic

Hunting for Life on Mars

1 mei 2017 · 27 min

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As a small rocky planet, Mars is similar in many respects to the Earth and for that reason, many have thought it may harbour some kind of life. A hundred years ago, there was serious talk about the possibility of advanced civilisations there. Even in early 1970s, scientists mused that plant-like aliens might grow in the Martian soil. The best hope now is for something microbial. But the discovery that even simple life survives there or did some time in its history would be a profound one. We would know that life is not something special to Earth. Lees meer

NASA’s Curiosity rover has discovered that 3.7 billion years ago, there were conditions hospitable to life on Mars – a sustained period of time with lakes and rivers of water. The earlier rover Spirit found deposits of silica from ancient hot springs which some planetary scientists argue bear the hallmarks of being shaped by microbes - possibly.

The next five years may dramatically advance the hunt for life on Mars. In 2020 the European and Russian space agencies will send their ExoMars rover. That will drill two metres into the Red Planet’s surface and sample material shielded from the sterilising radiation. It will analyse for life both extant and extinct. In the future, robotic or possibly human missions may even explore Martian cave systems in Mars' vast volcanoes. Monica talks to Nasa's Penny Boston whose adventures in some of the world's most dangerous caves have convinced her that underground is the best place to look.

Monica Grady is Professor of Planetary and Space Science at the Open University.

Credit: Curiosity in Gale Crater, credit NASA-JPL

Producer: Andrew Luck-Baker

Lifechangers: Charles Bolden

24 april 2017 · 27 min

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In Lifechangers, Kevin Fong talks to people about their lives in science. Lees meer

Major General Charles Bolden – a former NASA administrator – talks to Kevin Fong about his extraordinary life, from childhood in racially segregated South Carolina to the first African American to command a space shuttle. He had originally hoped to join the Navy, but was unable to as an African American. Although Charles refused to take no for an answer and after much petitioning he was accepted. From there he reached for the stars.

Image: Charlie Bolden, © Alex Wong/Getty Images

Lifechangers: Neil deGrasse Tyson

17 april 2017 · 27 min

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In Lifechangers, Kevin Fong talks to people about their lives in science. Lees meer

Astrophysicist and Director of the Hayden Planetarium in New York City, Neil deGrasse Tyson is well known in the US since he presented the TV series Cosmos: a spacetime odyssey. He talks to Kevin Fong about growing up in Brooklyn, becoming obsessed with the night sky and how he became a broadcaster and writer.

Image: Neil deGrasse Tyson, © Cindy Ord/Getty Images for FOX

Lifechangers: George Takei

10 april 2017 · 27 min

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In the start of a new series of Lifechangers, Kevin Fong talks to three people about their lives in science. Lees meer

His first conversation is with a man better known for his life in science fiction, George Takei, the Japanese American actor who played Sulu in the TV series, Star Trek. They discuss the voyages of the Starship Enterprise and the ideas of other worlds featured in Star Trek. He talks about his own epic life journey – how his family was imprisoned when the US joined the Second World War and his campaigning against social injustice.

Photo: George Takei making the Live Long and Prosper symbol, © Suhaimi Abdullah/Getty Images

The Bee All and End All

6 april 2017 · 27 min

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Bees pollinate and can detect bombs and compose music. What would we do without them? The world owes a debt of gratitude to this hard working but under-appreciated insect. One third of the food we eat would not be available without bees, meaning our lives would be unimaginably different without them. Lees meer

Bee populations are dropping by up to 80% in some countries and the consequences are potentially catastrophic. The use of neonics pesticides in farming has been one of the main causes in the decline in bee numbers and now the farming world is having to take drastic action to try and reverse the trend. The situation has become so dire in some parts of China that the government set up a scheme in which humans had to pollinate plants by hand. Researchers in America have been so worried about a world without bees that they have started to develop robotic 'insects' to emulate their work. What’s causing the drop in populations and what might save them?

Dr George McGavin hears from scientists and researchers in Africa, South America, Europe and Asia about the extraordinary lives and impact of bees, hearing the amazing ways in which they communicate and learn, and how complex and diverse different bee species are.

Extending Embryo Research

27 maart 2017 · 27 min

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Since the birth of Louise Brown - the world’s first IVF baby - in England in 1978, many children have been born through in vitro fertilisation. IVF doesn’t work for everyone but over the last few decades basic research into human reproduction has brought about huge improvements. Lees meer

In the UK the Human Fertilisation and Embryology Act, passed in 1990, made it illegal for research on human embryos to be permitted beyond 14 days. In a dozen other countries, from Canada and Australia to Iceland and South Korea the 14 day limit is enshrined in law and in five others, including China, India and the US, there are guidelines that recommend that limit.

Just recently researchers at Cambridge University have kept embryos alive in the lab for 13 days. They and others are calling for the limit to be extended for another one or two weeks, so they can study why early pregnancies fail. Matthew Hill reports on the issues raised by these new developments in embryo research.

Image: Light micrograph of fertilized human egg cell © Science Photo Library

The Split Second Decision

20 maart 2017 · 27 min

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As the pace of technology moves at ever greater speeds, how vulnerable are we when making split second decisions? Kevin Fong flies with the Helicopter Emergency Medical Service, making split-second, life-or-death decisions. He examines how we can come to terms with the growing challenge of quick and accurate front line decision making. Lees meer

Picture: Presenter, Kevin Fong in air ambulance, Credit: BBC

Human Hibernation

13 maart 2017 · 27 min

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Ever wished you could miss an entire cold dark winter like bears or dormice? Kevin Fong explores the possibilities than humans could hibernate. This ability could help us recover from serious injury or make long space flights pass in a flash. Lees meer

The first report on human hibernation in a medical journal was in the BMJ in 1900. It was an account of Russian peasants who, the author claimed, were able to hibernate. Existing in a state approaching "chronic famine", residents of the north-eastern Pskov region would retreat indoors at the first sign of snow, and there gather around the stove and fall into a deep slumber they called "lotska". No-one has ever found these peasants but there is serious research into putting humans into suspended animation, for long distance space travel or for allowing the body to recover from major injury.

The greatest clues into how to pull off hibernation comes from the American Black Bear. Dr Kevin Fong, an expert in trauma medicine, talks to Dr Brian Barnes, Director of the Institute of Arctic Biology at the University of Alaska. He's done the most extensive study of black bears and observed how they slow down their metabolism. Fat-tailed lemurs are the only primates to hibernate. Duke University's Lemur Research Centre has discovered that they breathe just once every 20 minutes at their deepest torpor. These lemurs live longer than other animals of similar size. Could we find a way to use this trick of suspended animation? We could slow down out physiology ,cool down our bodies and hibernate during long space journeys. NASA too is working on how humans can survive trips to other solar systems.

Kevin Fong goes to the lab of Professor Robert Henning at the University Medical Centre in Groningen where he's worked out how animals protect their organs when they slow their body metabolism , enter a state of torpor and then return to normal physiology. Rob Henning wants to apply this to humans, on earth and in space. Already doctors use cooli…

Delivering Clean Air

3 maart 2017 · 26 min

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Internet shopping continues to rise worldwide. That means a lot more delivery vans on the streets of our towns and cities. Those vans and trucks, often powered by dirty diesel engines, are contributing to air pollution problems that can cause significant increases in premature death and great discomfort for people suffering from heart and lung conditions. Lees meer

As part of the BBC’s So I Can Breathe season Tom Heap sets out to find innovative solutions. Could drones or robots be the answer? Could we cut out the middle man and use 3D printers to create everything we want at home? Perhaps it is simply a matter of converting all those vans to electric or gas power or even carrying out the majority of home deliveries by bike.

With the promise of ever-quicker delivery times the search for a solution becomes ever more urgent if we are to prevent our consumer addiction becoming an air pollution crisis on every doorstep.

(Photo: Tom Heap. Credit: Martin Poyntz-Roberts)

Make Me a Cyborg

27 februari 2017 · 27 min

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Frank Swain can hear Wi-Fi. Lees meer

Diagnosed with early deafness aged 25, Frank decided to turn his misfortune to his advantage by modifying his hearing aids to create a new sense. He documented the start of his journey three years ago on Radio 4 in 'Hack My Hearing'.

Since then, Frank has worked with sound artist Daniel Jones to detect and sonify Wi-Fi connections around him. He joins a community around the world who are extending their experience beyond human limitations.

In 'Meet the Cyborgs' Frank sets out to meet other people who are hacking their bodies. Neil Harbisson and Moon Rebus run The Cyborg Foundation in Barcelona, which welcomes like-minded body hackers from around the world. Their goal is not just to use or wear technology, but to re-engineer their bodies.

Frank meets the creators of Cyborg Nest, a company promising to make anyone a cyborg. They have recently launched their first product - The North Sense - a computer chip anchored to body piercings in the chest, which vibrates when it faces north.

But it’s not only new senses that are being developed. Other people are focusing on modifying lifesaving medical devices. Dana Lewis from Seattle has created her own 'artificial pancreas' to help manage her Type 1 diabetes and released the code online.

Frank asks - should limits be placed on self-experimentation? And will cybernetic implants eventually become as ubiquitous as smart phones?

Features music composed for The North Sense by Andy Dragazis.

Image: Row of microchips and capacitors on circuit board, © EyeWire

Presenter: Frank Swain
Producer: Michelle Martin.

Why do some people have no sense of direction?

21 februari 2017 · 27 min

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Two challenges for the team today involving singing and navigating. Lees meer

The Melodic Mystery
"Why is my mother tone deaf?" asks listener Simon, "and can I do anything to ensure my son can at least carry a tune?" Hannah admits to struggling to hold a tune and has a singing lesson with teacher Michael Bonshor, although it doesn’t go quite to plan.

We meet Martin who hates music because he has the clinical form of tone deafness, known as amusia. Just as people with dyslexia see words differently to other people, if you have amusia you don't hear melodies in the same way. Adam talks to music psychologist Dr Vicky Williamson from Sheffield University who studies Martin, and others like him, to try and discover why their brains operate differently.

The Lost Producer
In our second case, we investigate why some people have a terrible sense of direction. It’s the turn of Producer Michelle to be put to the test to try improve her poor navigational skills.

Prof Hugo Spiers from University College London examines Michelle’s sense of direction using his free game 'Sea Hero Quest'. Catherine Loveday from the University of Westminster suggests strategies to stop Michelle from getting lost. And tune in to find out which country houses the world’s best navigators.

Photo: Indonesian Army personnel read a map. Credit: Juni Kriswanto/AFP /Getty Images)

Why am I left-handed?

13 februari 2017 · 27 min

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Neal Shepperson asks, "What determines left or right handedness and why are us lefties in the minority?" Lees meer

One in ten people are left-handed, but where does this ratio come from and when did it appear in our evolutionary past?

Hannah talks to primatologist Prof Linda Marchant from Miami University about why Neanderthal teeth could hold the answer.

Prof Chris McManus from University College London tells Adam about his quest to track down the genes responsible for whether we're right or left handed.

But does left-handedness affect people’s brains and behaviour? Some researchers point to a link between left-handedness and impairments like autism or dyslexia. Others claim that lefties are more creative and artistic.

So where does the answer lie? The team consults Professors Sophie Scott, Chris McManus and Dorothy Bishop to find out the truth about left-handers.

If you have any Curious Cases for the team to investigate please email curiouscases@bbc.co.uk

Picture: Left handed child, credit: Diarmid Courreges/AFP/Getty Images

Presenter: Adam Rutherford & Hannah Fry

Producer: Michelle Martin.

Does the full Moon make us act oddly?

6 februari 2017 · 27 min

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Listener Paul Don asks: "I'm wondering what's the feasibility of terraforming another planet ie Mars and if it is possible to do the same thing with something like the moon? Or, why isn't there already a moon-base? Surely that is easier." Lees meer

Dr Adam Rutherford and Dr Hannah Fry consider moving to another planet, and discover what challenges they would need to overcome to live in space. They consult engineer Prof Danielle George from the University of Manchester and Dr Louisa Preston, UK Space Agency Aurora Research Fellow in Astrobiology. Adam also hears about attempts to recreate a Martian base on a volcano in Hawaii. He calls Hi-Seas crew member Tristan Bassingthwaighte, who has just emerged from a year of isolation.

The Bad Moon Rising
“A teacher I work with swears that around the time of the full moon kids are rowdier in the classroom, and more marital disharmony in the community," says Jeff Boone from El Paso in Texas. “Is there any biological reason why the moon's phases could affect human moods and behaviour?”

Our scientific sleuths sift through the evidence to find out if the moon really does inspire lunacy. They consider Othello's testimony, a study on dog bites and homicides in Florida before coming to a conclusion based on current scientific evidence. Featuring neuroscientist Eric Chudler from the University of Washington and health broadcaster and author Claudia Hammond.

If you have any Curious Cases for the team to solve please email curiouscases@bbc.co.uk.

(Photo: A full moon. Credit: Matt Cardy/Getty Images)

Why do we get middle-aged spread?

30 januari 2017 · 27 min

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Two cases today for Drs Adam Rutherford & Hannah Fry to investigate, involving strength and weight. Lees meer

The Portly Problem

"Why do we have middle aged spread?" asks Bart Janssen from New Zealand. In this episode we ponder the science of fat, from obese mice to big bottoms.

Why do we put on weight in middle age? And are some types of fat better than others? Hannah meets Prof Steve Bloom at Imperial College, London to discuss why pears are better than apples when it comes to body shape.

And Adam talks to Dr Aaron Cypess from the National Institutes of Health in Maryland, who has created a 'fatlas' - an atlas that maps fat inside the body.

The Strongest Substance

"What is the strongest substance in the universe?” asks Françoise Michel. “Some people say it is spider web, because it is stronger than steel. Is it iron? Is it flint? Is it diamond because diamond can be only be cut by diamond?"

Adam and Hannah put a variety of materials, from biscuits to toffees, under the hammer to test their strength.

In their quest to find the strongest substance on earth they quiz materials scientist Mark Miodownik, engineer Danielle George and spidergoat creator, Dr Randy Lewis from Utah.

Please send your Curious Cases for the team to investigate to curiouscases@bbc.co.uk

Photo: A man works out at a slimming centre in Beijing, credit: LIU JIN/AFP/Getty Images

Presenters: Adam Rutherford, Hannah Fry
Producer: Michelle Martin

Does nothing exist?

23 januari 2017 · 27 min

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"Is there any such thing as nothing?" This question from Bill Keck sparked a lot of head scratching. Lees meer

Dr Adam Rutherford and Dr Hannah Fry first consider the philosophy and physics of nothing. As Prof Frank Close, author of Nothing: A Very Short Introduction explains, nothing has intrigued great thinkers for thousands of years, from the Ancient Greeks to today's particle physicists.

Otto Von Geuricke, the Mayor of Magdeburg in Germany, invented the artificial vacuum pump in the 17th Century and presented spectacular displays to demonstrate the awesome power of nothing.

Cosmologist Andrew Pontzen helps Hannah search for nothing in the depths of space and inside the atom. However, as they find out, recent discoveries in subatomic physics have proved that nothing is impossible.

Undeterred, the team continue the hunt for nothing by turning to mathematics. The story of zero is fraught with inspiration, competition and controversy.
Banned in Florence and hated by the Church, zero had a rocky road to acceptance after its genesis in India.

Hannah talks to author Alex Bellos and hears about his journey to India to see the birth of zero. Plus, Adam is sent on a mission to understand calculus and enlists the help of Jeff Heys from Montana State University.

Photo: A black hole on a white background, Credit: BBC

Sesame Open

16 januari 2017 · 27 min

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There's a new light of hope in the Middle East. It's a scientific experiment called SESAME - intended to do world-class science and bring together researchers from divided nations. Its members include Palestine and Israel, Pakistan and Iran, Jordan, Egypt, and more. First conceived in the late 1990s, it has just seen the first spark of electricity flow through its high-vacuum steel pipes, last week, and first science should follow soon. The BBC’s Roland Pease paid his second visit to the SESAME campus just as the final pieces were being put in place, and met some of the key players, and heard their hopes. Lees meer

Picture: Sesame with presenter Roland Pease and Herman Winnick, copyright Noemi Caraban

The Future of the Climate Deal

9 januari 2017 · 38 min

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The incoming administration of President Trump has frightened many in the international environmental community. The result of US election in November was announced during the 2016 Marrakech UN Climate Change Conference, a meeting where most delegates were working to deliver on the promises of the previous Paris accord. Instead, a new US direction seemed to have emerged, with some in the new US cabinet going so far as to suggest the US should withdraw altogether from Paris, scrap the US’s own Clean Power act, and re-open coal mines. Roger Harrabin explores whether the Climate Deal is dead, and whether the EU and other countries, such as China and India, might follow the Trump suit and relax their low-carbon initiatives. Lees meer

Image: Republican presidential nominee Donald Trump holds a sign supporting coal during a rally at Mohegan Sun Arena in Wilkes-Barre, Pennsylvania on October 10, 2016, credit: Dominick Reuter/AFP/Getty Images

Science Stories: Series 3 - Mesmerism and Parapsychology

2 januari 2017 · 27 min

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Anton Mesmer was a doctor who claimed he could cure people with an unknown force of animal magnetism. He was the subject to a committee that found there was no evidence for his powers. Phil Ball tallks to Simon Shaffer, Professor of History of Science at Cambridge University, about the rise of showmanship in science at the time of Mesmer in the later 18th Century, and to Professor Richard Wiseman of Hertfordshire University about contemporary parapsychology. Lees meer

Image: 1784: Franz Friedrich Anton Mesmer (1734 -1815) Austrian doctor known for inducing a trance-like state, called mesmerism, Credit: Hulton Archive/Getty Images

Science Stories: Series 3 - The Woman Who Tamed Lightning

26 december 2016 · 26 min

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Naomi Alderman tells the story of Hertha Marks Ayrton, the first woman to be admitted to the Institution of Electrical Engineers, who improved electric arc lights. Lees meer

Photo: Street lamps light up a road in Colombo, credit: Ishara S.KODIKARA/AFP/Getty Images

Science Stories: Series 3 - Testosterone: Elixir of Masculinity

19 december 2016 · 27 min

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Testosterone has been claimed as one of the most important drivers of human life – through the agency of sex and aggression. In the 19th century, Charles-Eduoard Brown-Séquard injected himself with extracts from ground-up animal testicles, and made startling claims for its rejuvenating properties and its ability to enhance virility. But the amount of testosterone derived from the injection was actually so small that it could only have been a placebo effect. Today synthesised testosterone is increasingly prescribed for the so-called ‘male menopause’; it’s also regularly used for trans men as they transition, as well as for some women with low libido. In ‘How Much Testosterone Makes You a Man’, Naomi Alderman explores how testosterone had been used and abused in the past. She considers the credits and deficits of its story, and asks what it can tell us about identity and masculinity. Lees meer

Image: Stick men, BBC Copyright

Science Stories: Series 3 - Making the Earth Move

12 december 2016 · 27 min

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Prior to 1543 it was generally believed that the earth lay static in the centre of the universe, while the Sun, moon, planets and stars revolved around it in various complex paths, some even looping back and forth, as described by the Egyptian astronomer Ptolemy over a millennium before. This Ptolemaic system sat comfortably reconciled with philosophy and biblical scripture, not to mention immediate experience and observations. Lees meer

In the 16th century astronomy and astrology were closely intertwined, as the art of predicting where the small dots of light on the night sky would appear had consequences if you were the sort of person who based your actions on horoscopes. But astronomers didn't have the right to start telling philosophers and theologians how the universe was actually constructed - what its mechanisms were - they merely observed the moving dots of light and used mathematics to predict where they would be the next night, week or month. This was an essential function for the Catholic church too - as the all-important date of Easter is based around a complicated lunar pattern.

But also at that time in northern Europe, Martin Luther and others had begun a protestant revolution, fundamentally questioning the authority of the Pope and Vatican.

It was an auspicious time for a fairly middle ranking Catholic cleric, Nicolaus Copernicus, working in a remote corner of northern Poland to drop a note around telling other astronomers that he'd worked out a new system that made for better astronomical calculations by making the moon travel round a spinning earth, and the earth and all the planets travel around the Sun.

If that were the true shape of the universe, the bible could no longer be literally true.

It took 30 years, but eventually a keen young Austrian mathematician convinced him to publish his book.

So a German radical protestant published a book by a mild-mannered Polish Catholic cleric, a book that allegedly simplified the cosmos, rightfully placing the …

Origins of Human Culture

5 december 2016 · 27 min

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We humans are such a successful species. Homo sapiens have been around for only around 100 000 years and in that time we have utterly transformed the world around us. Our shelters allow us to live in all climates and from the poles to the tropics; our technology lets us communicate across the planet. We’ve created art and music and literature; and our agriculture has changed global biodiversity, shifting forever the way we feed ourselves. In other words, human culture dominates the earth. Gaia Vince finds out what has given us the cultural edge over other animals. This includes our closest relatives – the great apes – with whom we share over 95% of our genes. Lees meer

She meets researchers at Birmingham University comparing the abilities of chimps and human children, and has a go at making a prehistoric stone hand axe by flint knapping.

Photo credit: William West/AFP/Getty Images

Mind Reading

28 november 2016 · 27 min

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Whether it's gossiping over a drink, teaching our children, or politicians debating we use words to communicate with each other and share ideas. It’s what makes us human. But what if we can’t? Could it be possible to broadcast our thoughts directly from our brains without the need for speech? Gaia Vince meets the scientists who say they are getting close to being able to read minds. Lees meer

For the last decade neuroscientists have been using fMRI brain scanners and EEG to try to communicate with people who’d been diagnosed as being in a persistent vegetative state. They have woken up following a coma but although their eyes are open and they have spontaneous movements, they have no cognitive function and are not capable of higher level thought. Dr Damian Cruse, of Birmingham University, tells Gaia about the results of these experiments.

People with other medical conditions that lead to a loss of speech, such as motor neurone disease, can already communicate with technology. We hear from Sarah Ezekiel, who has had MND since 2000 and whose life has been transformed by being able to talk artificially with eyegaze software on a computer.

Neurologist Dr Kai Miller at Stanford University explains how he is using electrodes already implanted in the brains of people with severe epilepsy to determine what they are seeing.

And Gaia explores the ethical problems that follow from technology that captures thoughts with cognitive scientist and philosopher Dr Adina Roskies of Dartmouth College in the US and Professor Geraint Rees, the editor of a recent collection of essays called "I know what you're thinking: brain imaging and mental privacy". She looks at the controversial privacy issues raised by the technology, such as could someone put thoughts into another's mind?

Image: Fortune teller gazing into a crystal ball, © Creatas

Custom of Cutting

21 november 2016 · 32 min

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More than 200 million women and girls alive today have undergone female genital mutilation, or cutting. It is where parts or all of a girl's genitals are damaged or removed. There are no medical benefits to FGM, and people who undergo the practice can face problems in later pregnancies, infections and even death due to blood loss. FGM is recognised internationally as a violation of the human rights of girls and women. The head of the UNFPA recently described it as child abuse. The BBC's Global Health correspondent Tulip Mazumdar has travelled to East and West Africa to investigate efforts to end the practice and ask why this extremely harmful tradition, is proving so difficult to stamp out. Lees meer

(Picture: Women in Narekuni © Krisztina Satori)

The Inflamed Mind

14 november 2016 · 27 min

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Depression or psychotic illness is experienced by hundreds of thousands, perhaps millions, of people in the UK. James Gallagher talks to the psychiatrists investigating this new understanding of mental illness and to people who may benefit from treatments aimed at the immune systems rather than their brain cells. Lees meer

“I believe this is one of the strongest discoveries in psychiatry in the last twenty years”, says Professor Carmine Pariante of his and other research on the immune system and depression. "It allows us to understand depression no longer as just a disorder of the mind and not even a disorder of the brain, but a disorder of the whole body. It shifts conceptually what we understand about depression."

James also talks to New York journalist Susannah Cahalan. She began to experience paranoid delusions and florid hallucinations when her immune system made damaging antibodies against part of the molecular circuitry in her brain. Treatment to eliminate the antibodies prevented her committal to psychiatric hospital. Psychiatrist professor Belinda Lennox at the University of Oxford says she has evidence that a significant proportion of people presenting for the first time with psychotic symptoms are victims of a similar autoimmune problem.

The City that Fell into the Earth

7 november 2016 · 26 min

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How do you move a city? Lesley Riddoch travels to Arctic Sweden to find out. Kiruna is gradually sliding into Europe's biggest iron ore mine. The city has to be rebuilt two miles away. That requires an extraordinary blend of planning, architecture, technology and stoicism. If anyone can do it then it's the Swedes. Lees meer

The Sun King of China

31 oktober 2016 · 26 min

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Meet Huang Ming, the Chinese inventor who describes himself as, 'the number one crazy solar guy in the world'. One of the prize exhibits of his museum in northern China is a vintage solar panel. It is a water heater, installed by President Jimmy Carter on the roof of the West Wing of the White House. Back in 1979 the installation was meant to symbolise a new solar-powered future for America. Instead, oil prices fell and Ronald Reagan removed the White House panels. Lees meer

Thirty-seven years on and it is China, not the US that is embracing the idea of a solar-powered economy. Huang Ming, an engineer, prominent political figure and businessman is leading the way with his foundation of Solar Valley. In 800 acres of land south of Beijing he employs 3000 people in solar research, development and manufacture.

Peter Hadfield visits Solar Valley to see the fruits of the sun, from a solar-powered yurt to the world's biggest solar-powered building. He asks if Huang Ming can persuade his nation to turn its back on coal and oil and angle its face toward the sun.

The Mars of the Mid-Atlantic

24 oktober 2016 · 26 min

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Ascension Island is a tiny scrap of British territory, marooned in the tropical mid-Atlantic roughly halfway between Brazil and Africa. It is the tip of a giant undersea volcano – rugged, remote and, up until around 150 years ago, almost completely devoid of vegetation. Lees meer

Peter Gibbs visits to learn how 19th Century botanist Joseph Hooker, encouraged by Charles Darwin, planted a forest on the island’s summit to trap moisture brought by the trade winds, introducing a panoply of flora from around the world - ginger, guava, bamboo, ficus and dozens more.

But is Ascension’s cloud forest all it appears? He talks to conservationists struggling to cope with invasive species running riot, hears about the rescue of Ascension’s tiny endemic ferns, encounters nesting turtles on the beaches and ventures among the chattering ‘wideawakes’ on the sweltering lava plains by the coast.

(Photo: Ascension Island. Credit: Matthew Teller)

Creating the Crick

17 oktober 2016 · 27 min

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The Francis Crick Institute, in the centre of London, is the UK’s brand new, game-changing centre for biology and medical research. Roland Pease joins the scientists as they move into the building. Sir Paul Nurse, Nobel Laureate, one of the UK’s top biologists and director of the Crick explains what makes the new institute so special. Professor Richard Treisman, who helped shape its vision, shows Roland how the building is designed to encourage collaboration. And Roland learns how cancer researcher Dr Caroline Hill is packing up and moving her experimental subjects – thousands of fish. Lees meer

Named for Francis Crick – the British scientist who unravelled the structure of DNA and how it codes the design of the molecules of life – this central London Institute is set to be the heart of British biomedical science – bringing together experts from 3 other world famous institutes, from three of London’s great universities, and from industry.

Picture: Scientists Move Into The Newly-built Francis Crick Institute in King's Cross on August 25, 2016, credit: Dan Kitwood/Getty Images

Presenter: Roland Pease
Editor: Deborah Cohen

Black Holes: A Tale of Cosmic Death and Rebirth

10 oktober 2016 · 27 min

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The discovery of gravitational waves by the LIGO observatory opens up a new form of astronomy, which will allow scientists explore the ultimate fate of dead stars, Black Holes. Roland Pease reports. Lees meer

The Whale Menopause

3 oktober 2016 · 27 min

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Killer whales and humans are almost unique in the animal kingdom. The females of both species go through the menopause in their 40s or 50s, and then live for decades without producing any more offspring themselves. It is an extremely rare phenomenon. No other mammal does this, including other apes, monkeys and elephants, with the exception of another species of toothed whale. There are good grounds for thinking the menopause evolved for a reason, but why? Lees meer

BBC science reporter Victoria Gill takes to the sea off the north-west coast of the USA with scientists who believe the killer whales in this part of the world can explain why the menopause evolved in both orca whales and our own species.

Victoria encounters 'Granny', the world's oldest known orca - a matriarch killer whale who is estimated to be between 80 and 105 years old. 'Granny' has not had a calf for at least 40 years and is still very much the leader of her family group.

Reversing Parkinson's

26 september 2016 · 27 min

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Parkinson’s Disease is one of the major neurodegenerative conditions. Cells die, for reasons not fully understood, causing a reduction in the production of the neurotransmitter, dopamine, and a raft of physical and behavioural problems. Although effective drug treatments are available, they wear off over time and have side effects. The highly individual nature of the condition and variation in its progression also makes dosage difficult. Sue Broom reports on two new approaches that could lead to treatments for Parkinson’s. One potential therapy is to replace the dying cells with new ones. This was tried several decades ago but the results were not promising. The new Transeuro trial of cell therapy hopes to lead to better outcomes. The second approach is to use stem cells. Sue Broom talks to the doctors and patients involved in these trials. Lees meer

Presenter/Producer: Sue Broom

Could we send our litter into space?

19 september 2016 · 27 min

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Two spacey cases today for doctors Rutherford and Fry to investigate, both sent in to BBC Future via Facebook. Lees meer

The Stellar Dustbin
'Can we shoot garbage into the sun?' asks Elisabeth Hill. The doctors embark on an astronomical thought experiment to see how much it would cost to throw Hannah's daily rubbish into our stellar dustbin. From space elevators to solar sails, they explore the various options that could be used to send litter to the Sun. Featuring space scientist Lucie Green and astrophysicist Andrew Pontzen.

A Study in Spheres
Another stellar question comes from Brian Passineau who wonders: 'why everything in space tends to be circular or spherical?'

Hannah gazes at Jupiter at The Royal Observatory, Greenwich with public astronomer, Dr Marek Kukula. Science writer, Philip Ball, explains how the astronomical obsession with celestial spheres came to an untidy end. And, physicist Dr Helen Czerski helps Adam on his quest to find the perfect natural sphere.

If you have any everyday mysteries for the team to investigate using the power of science, please email: curiouscases@bbc.co.uk

Producer: Michelle Martin

Image: A spiral galaxy, Credit: Fox Photos/Hulton Archive/Getty Images

Why do we faint?

13 september 2016 · 27 min

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Swooning maidens and clever horses feature in today's Curious Cases, sent in by listeners to curiouscases@bbc.co.uk. Lees meer

The Squeamish Swoon
Science sleuths Hannah Fry and Adam Rutherford investigate the following question sent in by Philip Le Riche:

'Why do some people faint at the sight of blood, or a hypodermic needle, or even if they bash their funny bone? Does it serve any useful evolutionary purpose, or is just some kind of cerebral error condition?'

Adam is strapped onto a hospital tilt table in an attempt to make him blackout and Hannah receives an aromatic surprise.

Featuring consultant cardiologists Dr Nicholas Gall and Dr Adam Fitzpatrick and cardiac physiologist Shelley Dougherty.

The Counting Horse
Our second case was sent in by retired primary school teacher Lesley Marr, who asks:

"Can horses count? I think they can. Any ideas about which animals can count and which can't?”

The team considers the case of Clever Hans, and hears from Dr Claudia Uller who has been conducting modern studies on equine counting.

Mathematician Prof Marcus Du Sautoy explains the basic concept of counting to Adam, and Hannah looks across the animal kingdom to find the cleverest mathematical creature.

If you have any questions you'd like the duo to investigate, please email curiouscases@bbc.co.uk

Producer: Michelle Martin

Image: A Canadian guard faints, Credit: Carolo Allegri/AFP/Getty Images

Why do people shout on their cellphones?

5 september 2016 · 27 min

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How does traffic jam? And, why do some people shout into their cellphones in public places? Two subjects guaranteed to annoy even the most patient listeners. Lees meer

The Phantom Jam
Listener Matthew Chandler wrote to us: "I travel on the motorway for work and often I find myself sitting in a traffic jam for ages, thinking there must be roadworks or an accident ahead, then suddenly the jam mysteriously disappears to reveal… nothing! There's no apparent reason whatsoever."

Doctors Rutherford and Fry discover the cause of these phantom jams. Adam ventures on to the M25 in search of a tailback, and Hannah looks at projects around the world designed to thwart traffic tailbacks.

This case features Neal Harwood from the Transport Research Laboratory and BBC technology reporter, Jane Wakefield. Plus a special guest appearance from Greg Marston, aka 'Masdar City Man'.

The Aural Voyeur
Listener Daniel Sarano, from New Jersey, asks why people shout on their mobile phones in public: "I have no interest in hearing about people’s private lives. I don’t enjoy the aural voyeurism. If people want to say 'honey I’m running late, be home in 5'. That’s OK, but discussing business or, worse, personal details…. I hate it. The whole idea would have seemed an anathema to older generations. I think they would have considered it rude to talk loudly in public. No sense of that in the 21st Century.”

We discover the answer to this annoying modern habit by delving into the inner workings of telephony. What follows is a tale of engineering rivalry, Victorian etiquette and early otolaryngology. Providing the answers are acoustic technologist Nick Zakarov and historian Greg Jenner, author of 'A Million Years in a Day: A Curious History of Daily Life'.

If you have any everyday mysteries for the team to investigate using the power of science, please email curiouscases@bbc.co.uk

Producer: Michelle Martin

Image: A man on a phone, Credit: Thinkstock

How do you make the perfect cup of tea?

29 augustus 2016 · 27 min

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A story of sorrow and comfort today, as Doctors Adam Rutherford and Hannah Fry investigate two mysteries sent in by listeners. Lees meer

The Psychic Tear
Edith Calman challenges our scientific sleuths to answer the following question:
“What is it about extreme pain, emotional shock or the sight of a three-year-old stumbling their way through an off-key rendition of Away in a Manger that makes the brain send messages to the lacrimal glands to chuck out water?"

Hannah discovers how the eye produces tears, with the help of Dr Nick Knight. Broadcaster Claudia Hammond, author of Emotional Rollercoaster, describes why Darwin experimented on his children until they cried. And, Adam watches a tearjerker to take part in a psychological study, but ends up getting angry instead.

The Tea Leaf Mystery
The team examine how to make the perfect cup of British tea, in response to Fred Rickaby from North Carolina:
"When we are preparing a cup of tea and the cup contains nothing but hot, brewed tea we need to add milk and sugar. My wife always adds the sugar first, stirs the cup to make sure it is dissolved and then add the milk. So, is that an optimum strategy for adding milk and sugar to a cup of tea?"

Adam consults Prof Andrea Sella from University College London about the chemistry of tea. Hannah visits a tea factory in Kent where Master Blender Alex Probyn teaches her an unusual method for tasting tea.

They conclude with the most important question: should you add the milk first or last? And, can tea professionals really tell the difference?

If you have any everyday mysteries for the team to investigate using the power of science, please email curiouscases@bbc.co.uk

Producer: Michelle Martin

Image: A woman holds a cup of tea, Credit: Thinkstock

What makes gingers ginger?

22 augustus 2016 · 27 min

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Doctors Adam Rutherford and Hannah Fry set out to solve the following perplexing cases sent in by listeners: Lees meer

The Scarlet Mark
Sheena Cruickshank in Manchester asks, "My eldest son is ginger but I am blonde and my husband brunette so we are constantly asked where the red came from. Further, people do say the 'ginger gene' is dying out, but how good is that maths or is it just anecdotal?"

Our science sleuths set out to discover what makes gingers ginger with a tale of fancy mice, Tudor queens and ginger beards. Featuring historian and author Kate Williams and Jonathan Rees from the University of Edinburgh, who discovered the ginger gene.

The Hairy Hominid
"How does leg hair know it has been cut? It does not seem to grow continuously but if you shave it, it somehow knows to grow back," asks Hannah Monteith from Edinburgh in Scotland.

Hannah Fry consults dermatologist Dr Susan Holmes, from the Hair Clinic at Southern General Hospital in Glasgow, to discover why the hairs on your legs do not grow as long as the hairs on your head.

Adam attempts to have a serious discussion about the evolutionary purpose of pubic hair with anatomist and broadcaster Prof Alice Roberts.

If you have a scientific mystery for the team to investigate, please email curiouscases@bbc.co.uk

Producer: Michelle Martin

Image: A woman with splendid hair, lying on grass, Credit: Thinkstock