Horizon: Which Universe Are We In?

100 trillion cells. 280 days. One human life. A BBC Science series, produced in partnership with The Open University, exploring the making of you.

Witness the remarkable story of our universe over billions of years and its inextricable link to life on Earth in this sweeping documentary series.

Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.

Oceanographer Sylvia Earle and a cast of marine scientists tell the story of the incredible work being done to protect our oceans fragile ecosystem.

A look at relevant scientific issues

PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and technology, and highlights the people involved in scientific pursuits.

Historian David Olusoga explores the enduring relationship between Britain and people whose origins lie in Africa.

Imagine a world where infinite copies of you are playing out every storyline of your life. It sounds like a plot stolen straight from Hollywood, but far from it. This is the multiverse. Until very recently the whole idea of the multiverse was dismissed as a fantasy, but now this strangest of ideas is at the cutting edge of science. And for a growing number of scientists, the multiverse is the only way we will ever truly make sense of the world we are in. Do multiple universes exist? And if so, which one are we actually in?" Imagine a world where dinosaurs still walk the earth. A world where the Germans won World War II and you are president of the United States. Imagine a world where the laws of physics no longer apply.