Inside the Human Body

Horizon visits state-of-the-art laboratories and uses CGI to recreate the science-fiction-worthy weather experienced on other planets.

All the incredible diversity of animal life sprang from a single organism. Every animal, no matter how weird, is related to every other. And behind each species is an incredible story of the millions of generations that gave rise to it - every animal we know and love today sprang from creatures that looked nothing like it.

There's nothing else like it. Chris Packham reveals the epic, four-billion-year story of our home - from its dramatic creation to the arrival of human life... and whatever's next.

This revealing series follows environmental activist Greta Thunberg as she seeks to raise awareness of the accelerating climate change and spread her message, that we must act to drastically reduce our carbon emissions.

There’s something very odd going on in space – something that shouldn’t be possible. It is as though vast swathes of the universe are being hoovered up by a vast and unseen celestial vacuum cleaner. Sasha Kaslinsky, the scientist who discovered the phenomenon, is understandably nervous: ‘It left us quite unsettled and jittery’ he says, ‘because this is not something we planned to find’. The accidental discovery of what is ominously being called ‘dark flow’ not only has implications for the destinies of large numbers of galaxies – it also means that large numbers of scientists might have to find a new way of understanding the universe. Dark flow is the latest in a long line of phenomena that have threatened to re-write the textbooks. Does it herald a new era of understanding, or does it simply mean that everything we know about the universe is wrong? .

For millions of years, volcanoes have shaped the planet. These fiery engines of the Earth have the ability to create new worlds and destroy old ones. But why do they exist? What causes these giants to erupt? Can we escape their fury?