There are seven billion humans on Earth, spread across the whole planet. Scientific evidence suggests that most of us can trace our origins to one tiny group of people who left Africa around 70,000 years ago. In this five-part series, Dr Alice Roberts follows the archaeological and genetic footprints of our ancient ancestors to find out how their journeys transformed our species into the humans we are today, and how Homo Sapiens came to dominate the planet.

We have been colonised by the machines we have built. Although we don't realise it, the way we see everything in the world today is through the eyes of the computers.

A five-part series that features the latest research exploring how early humans evolved. See how the mixing of prehistoric human genes led the way for our species to survive and thrive around the globe. Archaeology, genetics and anthropology cast new light on 200,000 years of history, detailing how early humans became dominant.