What is the most toxic animal on earth? Why is a rhino armour plated? Professor Ben Garrod discovers the complex ways in which skin helps defend animals against threats of all kinds.

Professor Ben Garrod explores how some snakes can see using heat, how crocodiles feel through their jaws, and how some animals use electricity to navigate their world.

With some 100 billion neurons and over 100 trillion connections - more than all the stars in the Milky Way - the human brain is one of nature's greatest achievements. But how did something so incredibly sophisticated evolve from its simple beginnings?

From playing computer games with chimpanzees to studying modern relationships, Jim Al-Khalili investigates how the brain evolved and how it differs from AI.

Film telling the story of the greatest physicists of the 20th century and the discoveries they made, told in their own words. Men and women who transformed our understanding of the universe, from unlocking the secrets of the atom to solving the mysteries of the cosmos.

The series will celebrate the diversity of life on each of these continents, but also the challenges faced by animals in a modern world.

Antarctica - the coldest, windiest, most hostile continent. Only the toughest can survive here. But the ocean here is warming and with that comes an uncertain future.

Asia - where rarely seen animals roam the hottest deserts, tallest jungles and highest mountains on Earth.

South America - the most species-rich continent on earth. From the volcanoes of the Andes to the world’s largest rainforest, animals here must specialise to carve out a niche.

Australia, a land cast adrift at the time of the dinosaurs. Isolated for millions of years, the weird and wonderful animals marooned here are like nowhere else on Earth.

Europe - a continent transformed by mankind, where extraordinary animals are found in surprising places.

North America - a land of change where pioneering animals make the most of surprising opportunities.

Africa - home to the greatest wildlife gatherings on earth. But even in this land of plenty, wildlife faces huge challenges.

Sex is a simple word for a very complex set of desires. It cuts to the core of our passions, our wants, our emotions. But when it goes wrong, it can be the most painful thing of all. Professor Alice Roberts looks through 45 years of Horizon archive to see how science came to understand sex, strived to solve our problems with it, and even help us to do it better. Can science save the day when sex goes wrong?

Professor Jim Al-Khalili tells the story of our quest to master the power of electricity.

How pioneers unlocked electricity's mysteries and built strange instruments to create it.

How harnessing the link between magnetism and electricity transformed the world.

How we finally came to understand the science of electricity.

Hannah Fry takes a spectacular look at the science of size. Hannah starts by asking whether things could be bigger, including Earth and living things.

Hannah Fry takes a look at the science of size. Here, she asks if things could be smaller, including the Earth, living things and the Sun.

Dr Helen Czerski examines the world of sound waves. She investigates the extraordinary science behind the sounds we're familiar with and the sounds that we normally can't hear.

Dr Helen Czerski examines the extraordinary messages sound waves carry and how they help us understand the world around us.

Documentary celebrating the extraordinary Professor Stephen Hawking, written and narrated by the man himself

The world's most famous living scientist talks exclusively about his experience of fame, thanks to the success of A Brief History of Time, and his desire to use that fame to inspire the next generation of scientists

Broadly considered a brand that inspires fervour and defines cool consumerism, Apple has become one of the biggest corporations in the world, fuelled by game-changing products that tap into modern desires.

The story of Steve Jobs, featuring a rare interview and providing a unique insight into what made him tick.

Renowned magician James 'The Amazing' Randi has been wowing audiences with his jaw-dropping illusions, escapes and sleight of hand for over 50 years.This entertaining film chronicles Randi's best debunkings of faith healers, fortune tellers and psychics.

Storyville: Documentary which tells the story of the most ambitious project ever conceived on the internet and the people who tried to stop it. In 1937 HG Wells predicted the creation of the 'world brain', a giant global library that contained all human knowledge which would lead to a new form of higher intelligence.

A Storyville documentary exploring the true impact of artificial intelligence on the world.

Nominated for an Academy Award, this film tells the uplifting story of Owen Suskind, an autistic young man and his family. After unremarkable early years, at the age of three Owen withdrew and suddenly stopped speaking. Diagnosed with autism, Owen slowly emerged from his isolation by immersing himself in Disney animated films, using them as an emotional road map to reconnect with the wider world.