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The Supercalculators Dec 11, 2019

Show notes

Alex Bellos is brilliant at all things mathematical, but even he can't hold a candle to the amazing mathematical feats of the supercalculators. Alex heads to Wolfsburg in Germany to meet the contestants at this year's Mental Calculation World Cup. These men and women are the fastest human number crunchers on the planet, able to multiply and divide large numbers with no need to reach for a smart phone, computer or calculator. So how do they do it, and is it a skill that any of us can learn? Alex talks to Robert Fountain, the UK's two-time winner of this prestigious prize, about his hopes for this year's competition and the mathematical magicians of the past who have inspired him. He also meets Rachel Riley, Countdown's number queen, to find out what it takes to beat the countdown clock.

Produced by Alexandra Feachem.

First broadcast on Tuesday 16 October, 2018.

A Trip around Mars with Kevin Fong Dec 04, 2019

Show notes

The planet Mars boasts the most dramatic landscapes in our solar system. Kevin Fong embarks on a grand tour around the planet with scientists, artists and writers who know its special places intimately- through their probes, roving robots and imaginations.

As we roam Mars' beauty spots, Kevin explores why the Red planet grips so many. Beyond its alien topographic grandeur, Mars inspires the bigger questions: are we alone in the cosmos, and what is the longer term destiny of humanity? Was there more than one life genesis? Will humans ever live on more than one planet?

The itinerary includes the solar system's greatest volcano - Olympus Mons. It is an ancient pile of lavas more than twice the height of Everest, with a summit crater that could contain Luxembourg.

The weight of Mars' gargantuan volcanic outpourings helped to create the planet's extreme version of our Grand Canyon. Vallis Marineris is an almighty gash in the crust 4,000 kilometres long and seven kilometres deep. That is more than three times the depth of Earth's Grand Canyon. In some place the cliffs are sheer from top to bottom.

A little to the east lies an extraordinary region called Iani Chaos, a vast realm of closely spaced and towering rock stacks and mesas, hundreds to thousands of metres high. One researcher describes it as Tolkienesque. This unearthly shattered terrain was created billions of years ago when immense volumes of water burst out from beneath the surface and carved another giant canyon, known as Ares Valles, in a matter of months. Imagine a hundred Amazon rivers cutting loose at once, suggests Professor Steve Squyres.

The catastrophically sculpted landscapes are part of the plentiful evidence that in its early days, Mars was, at time,s awash with water and, in theory, provided environments in which life could evolve and survive. That is what the latest robot rover on Mars - Curiosity - is exploring at the dramatic Gale Crater with its central peak, Mount Sharp.

Expert Mars guides in the programme include scientists on the current Curiosity mission, and on the preceeding rover explorations by Spirit and Opportunity. Kevin talks to hard sci-fi novelist Kim Stanley Robinson whose rich invocations of Martian landscapes form th narrative bedrock of his Mars Trilogy.

He also meets Bill Hartmann, a planetary scientist since earliest generation of Mars probes in the 1960s and 1970. Bill has a parallel career as an artist who paints landscapes of the Red Planet.

Planetary scientist Pascal Lee of the Mars Institute begins Kevin's tour with a painting he created - an imagined view of Mars from the surface of its tiny moon, Phobos.

Producer: Andrew Luck-Baker, BBC Radio Science Unit

Inside the Killing Jar Nov 27, 2019

Show notes

The work of the entomologist very often involves the killing of insects in large numbers. This happens in the search for new species in the exploration of the planet's biodiversity and in ecological investigations to monitor the health of wild insect populations and the impact we are having on the environment. But the methods of entomologists have come under criticism.

Last August presenter and entomologist Adam Hart was involved in a citizen science project aimed at surveying the abundance and distribution of the various species of social wasp around the country. The survey entailed members of the public setting up wasp traps in their gardens for a week and then sending the dead insects to the lab running the project. Many people took part but the study also generated negative newspaper coverage and stinging criticism on social media.

The reaction got Adam Hart thinking: can his profession really defend the death of thousands and sometimes millions of insects for the sake of science, especially when there's so much concern around insect conservation? How do entomologists feel about killing their subjects, and might the insects themselves feel something akin to pain and suffering themselves?

Producer: Andrew Luck-Baker.

A Sense of Time Nov 20, 2019

Show notes

Animal senses reveal a wealth of information that humans can't access. Birds can see in ultra violet, and some fish can 'feel' electricity. But how do different species sense time? If you've ever tried to swat flies, you'll know that they seem to have super-powered reactions that let them escape before you can blink. Presenter Geoff Marsh asks whether flies have some sort of super-power to see the world in slow motion. Are they watching your hand come down at what might appear a leisurely pace?

Science reveals a window into the minds of different species and their temporal perceptions. Some flies have such fast vision that they can see and react to movement at four times the rate you can, and our vision works at more than six times the speed of one species of deep sea fish. This programme delves into each moment of experience to ask 'what is time, biologically?' When birds have to dodge through forests and catch flies on the wing, or when flies have to avoid birds, it would seem that a faster temporal resolution would be a huge advantage. So what is their sense of time?

Geoff meets physicist Carlo Rovelli and asks him to jump outside of physics to answer questions on biology and philosophy. Geoff explores the mind of a bat with Professor Yossi Yovel in Israel, and dissects birdsong at super slow speeds with BBC wildlife sound recordist, Chris Watson. Getting deep into the minds of animals he questions whether our seconds feel like swordfish seconds, or a beetles' or birds' or bats..?

Presenter: Geoff Marsh Producer: Rory Galloway

The Sound of Space Nov 13, 2019

Show notes

The previously silent world of outer space is changing. In this audio tour around the Universe, Dr Lucie Green explores the sounds of space.

Some sounds have been recorded by microphones on-board interplanetary spacecraft. Others have been detected by telescopes and sped up until their frequency is tuned to our ears. The rest are sonified X-rays, space plasma or radio waves that reveal tantalising secrets about the universe that our eyes cannot see.

Everyone can recall the sound of the singing comet - a symphony created using measurements from the Rosetta mission. But many other sounds have been created from space data, from lightning on Jupiter to vibrations inside the Sun. From spinning pulsars to black holes and gamma ray bursts, outside our Solar System space becomes even stranger.

Joining Lucie Green on this sonic journey through space are: - Prof Tim O'Brien (Associate Director of Jodrell Bank Observatory), - Honor Harger (Executive Director of the ArtScience museum in Singapore) and - Dr Andrew Pontzen (Cosmology Research Group, University College London) with archive from Dame Jocelyn Bell-Burnell.

Producer: Michelle Martin.

Toilet: The Origin of Stuff - Episode 6 Oct 31, 2019

Show notes

You may call it the toilet, the loo, the privy, the potty, the can or even the bathroom, but whatever you call it, this everyday object has its roots in Bronze Age Pakistan. It even had a seat!

But how did the toilet come to be? Given one third of the world’s population still live without one, how much is our embarrassment around toilet habits to blame? And what scientific developments are underway to help make them truly universal?

Water and Sanitation Expert, Alison Parker, from Cranfield University believes part of the solution lies in a waterless toilet which creates ash, water from the waste it receives, and the energy it needs to operate, from the waste it receives.

Even in the UK, we don’t always have access to a toilet when we need one. Over the past decade, the number of public conveniences has dropped by a half, leaving older people and the disabled, who may need easy access, unable to leave their homes. Raymond Martin, Managing Director of the British Toilet Association, hopes to stop our public conveniences going down the pan.

Also featuring resident public historian Greg Jenner.

Producer: Beth Eastwood

Bed: The Origin of Stuff - Episode 5 Oct 31, 2019

Show notes

After a long journey, there’s nothing nicer for Katy than climbing into her own bed. It’s often the first major purchase we make when we grow up and leave home.

Its significance was not lost on our ancestors. The bed was often the place where societal attitudes to sleep, superstition, sex, and status were played out, sometimes in dramatic form.

So where did the bed come from, and what can this everyday object tell us about ourselves?

A sleeper in early modern times believed that sleep was akin to death, with the devil waiting to pounce after darkness. So bed-time rituals were performed at the bedside and wolves’ teeth were often hung around the sleeper’s neck. Iron daggers were dangled over the cradles of infants at night to prevent them from being changed into demon babies.

While we may have outgrown a fear of the devil, sleep expert and neuroscientist Prof Russell Foster fears the modern-day obsession that’s disrupting our sleep – our mobile devices. His advice? Prepare your bed for a good night’s sleep and defend it with a passion.

Also featuring resident public historian Greg Jenner, and Prof Sasha Handley, expert on Early Modern History and sleep during this time.

Producer: Beth Eastwood

Wine Glass: The Origin of Stuff - Episode 4 Oct 31, 2019

Show notes

Have you got one of those wine glasses that can hold an entire bottle of wine? Katy Brand does and she’s even used it for wine - albeit because of a sprained ankle, which would have stopped her from hobbling back and forth to the kitchen for refills.

But if we skip back a few hundred years, the wine glass was tiny. Footmen brought their masters what was essentially a shot glass. They quaffed back their wine in one. So how did we go from those dinky little things to the gargantuan goblets we have today? Is it because letting the wine breathe in a bigger glass makes it smell and taste better? Or is it a reflection of our drinking habits?

Join Katy and the show's resident public historian, Greg Jenner, is glass expert Russell Hand from Sheffield University and Barry Smith, Director for the Study of the Senses at London University.

Producer: Graihagh Jackson

Fork: The Origin of Stuff - Episode 3 Oct 31, 2019

Show notes

The fork is essential. Even camping without one is a false economy, in Katy’s experience. Even a spork - with a spoon at one end and a fork at the other, with a knife formed along one prong - just won’t do. You need both - a fork to steady the meat and a knife to cut it with.

So how did the fork come to be so indispensable?

We didn’t always love the fork. Public historian, Greg Jenner, reveals how it was abandoned for the chopstick in Ancient China, and greeted with scorn in Western Europe when a Byzantine princess ate with a golden double-pronged one.

It was only after the traveller, Thomas Coryat, in 1608, celebrated its use by pasta-loving Italians that the English started to take note. By the mid-19th century, there was a fork for every culinary challenge – from the pickle and the berry, to ice-cream and the terrapin. The utensil transformed the dining experience, bringing the pocket knife onto the table in a blunt, round-tipped form, and ushering in British table manners.

So is there a perfect version of the fork? With the help of tomato, milkshake and mango, Katy discovers that the material a fork is made from can drastically alter a food’s taste.

Featuring material scientist, Zoe Laughlin, and food writer and historian, Bee Wilson.

Producer: Beth Eastwood

High Heel: The Origin of Stuff - Episode 2 Oct 30, 2019

Show notes

Katy Brand loves a high heel. Once known by friends and family for her ‘shoe fetish’, her dad even gave her a ceramic heel that could hold a wine bottle at a jaunty angle.

These days, Katy’s cherished heels from her torture days live in her cupboard. She has traded the pain for the statement trainer. But their art, history and construction still fascinate her.

So what is it about the high heel that has made it stand the test of time?

With the help of resident public historian, Greg Jenner, Katy explores the heel’s fascinating passage through time, finding a place on the feet of men, as well as women, in high and low places. Heels donned the feet of men on horseback in 17th century Persia, were adored by King Louis XIV, and gained an erotic currency with the invention of photography.

But how has science and engineering ensured the high heel’s survival?

Footwear Technologist, Mike George, shows us how the high heel is engineered, and how he can test if a particular design is teetering on the edge of safety. Social scientist, Heather Morgan, reveals the perceived benefits of wearing heels, as well as the risks when she fell foul to when fell in heels and broke her ankle.

Producer: Beth Eastwood

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