Dallas Campbell delves into the Horizon archive to discover how our understanding of intelligence has transformed over the last century. From early caveman thinkers to computers doing the thinking for us, he discovers the best ways of testing how clever we are - and enhancing it.

Professor Alice Roberts is making a new human being - she is pregnant with her second child. But before he is born, she wants to find out what makes a human, human? What is that separates us from our closest living relatives - the chimpanzees?

Particle physicist and ex D:Ream keyboard player Dr Brian Cox wants to know why the Universe is built the way it is. He believes the answers lie in the force of gravity

What is wrong with nudity? Why are people embarrassed about their bodies? How and why did they get the way they are?

Danny Wallace really wants a robot. He wants it to walk like him and talk like him. It's what scientists have been promising us for generations but it's a promise so far unfulfilled. Danny circumnavigates the globe searching for robot nirvana and trying to uncover how far away his dream is.

Black holes are one of the most destructive forces in the universe, capable of tearing a planet apart and swallowing an entire star. Yet scientists now believe they could hold the key to answering the ultimate question - what was there before the Big Bang?

The world is affected by an obesity epidemic, but why is it that not everyone is succumbing? Medical science has been obsessed with this subject and is coming up with some unexpected answers. As it turns out, it is not all about exercise and diet. At the centre of this programme is a controversial overeating experiment that aims to identify exactly what it is about some people that makes it hard for them to bulk up.

Over 62 per cent of adults in the UK are currently overweight or obese and this figure is set to rise. A common attitude is that obese people should be ashamed - it is their fault, they have no will power and if they could just 'eat less and exercise more', the problem would soon be solved.

Horizon uncovers the secret world of our dreams. In a series of cutting-edge experiments and personal stories, we go in search of the science behind this most enduring mystery and ask: where do dreams come from? Do they have meaning? And ultimately, why do we dream?

Talking is something that is unique to humans, yet it still remains a mystery. Horizon meets the scientists beginning to unlock the secrets of speech - including a father who is filming every second of his son\'s first three years in order to discover how we learn to talk, the autistic savant who can speak more than 20 languages, and the first scientist to identify a gene that makes speech possible.

With unique access to five vaccine teams around the globe, this is the extraordinary inside story of the unprecedented quest to develop and make vaccines to fight Covid-19.

Famed for their ability to inflict Armageddon from outer space, asteroids are now revealing the secrets of how they are responsible for both life and death on our planet.

New planets are now being discovered outside our Solar System on a regular basis, and these strange new worlds are forcing scientists to rewrite the history of our own Solar System. Far from a simple story of stable orbits, the creation of our Solar System is a tale of hellfire, chaos and planetary pinball. It’s a miracle our Earth is here at all.

Professor Jim Al Khalili delves into over 50 years of the BBC science archive to tell the story behind the emergence of one of the greatest theories of modern science, the Big Bang.

The secret alchemy of material science revealed - how we transform materials, and materials transform the world

Professor Robert Winston presents his top ten scientific breakthroughs of the past 50 years. Tracing these momentous and wide-ranging discoveries, he meets a real-life bionic woman, one of the first couples to test the male contraceptive pill, and even some of his early IVF patients. He explores the origins of the universe, probes the inner workings of the human mind and sees the most powerful laser in the world.

As Boeing\'s new 787 Dreamliner makes its inaugural flight, Rolls-Royce engineers celebrate the performance of its revolutionary Trent 1000 jet engines.

A team of roboticists are creating the first ever complete bionic man. Where could this technology lead?

Gemma Chan, the star of Humans, explores Artificial Intelligence, and builds an AI version of herself. Are AI humans just around the corner, and can Robot Gemma convince anyone she's the real Gemma?

Britain's engineering companies reveal how they build the world's most amazing machines

In this series Professor Iain Stewart tells a stunning new story about our planet. He reveals how the greatest changes to the Earth have been driven, above all, by plants.

In the second episode, Iain discovers how flowers have transformed our planet. He journeys to the remote islands of the South Pacific to track down the earliest flowers.

In the third episode, Iain discovers the remarkable impact of just one plant: grass. On the savannah of South Africa he sees how grass unleashed a firestorm to fight its greatest enemy, the forests.

Documentary following researchers as they try to take the first-ever picture of a black hole. They must travel the globe to build a revolutionary telescope that spans planet Earth.

Documentary following researchers as they try to take the first-ever picture of a black hole. They must travel the globe to build a revolutionary telescope that spans planet Earth.

From the ultra clean environment of a microchip factory to the railway engineer who lifted a city to install sewers, innovation expert Steven Johnson traces the surprising journey from dirty to clean in our lives. He discovers the unsung heroes of this transformation, like the doctor who secretly experimented with a deadly chemical to treat the water supply, and the storekeeper who revolutionised cleanliness in the home.

For at least 100,000 years, humans have known how to make fire. But the skill to make cold is a very modern technique. Innovation expert Steven Johnson traces the unsung heroes of cold, like the doctor who was desperate to beat fever and created a refrigerator, the rookie heating engineer who discovered how to cool our homes and set off a mass migration to the desert, and the young man who cut ice from a lake and transported it thousands of miles.

It was only a few centuries ago that the best source of light came from burning oil scooped out of a whale's head. Innovation expert Steven Johnson discovers the unsung heroes of invention in the surprising journey from the candle to the neon lights of Las Vegas and the world of lasers.

The ability to transport our voices over long distances has been one of the greatest transformations in how we live our lives.

From submariners who live on an 18-hour day to the railway clerk who fought to standardise time zones, and the cobbler who invented the first cheap watch, innovation expert Steven Johnson discovers the surprising journey of time in our lives. He locates the unsung heroes whose ideas transformed our world of time from the sundial to clocks accurate to billionths of a second.