In BBC Inside Science, Alice Roberts, colleagues and guests illuminate the mysteries and challenge the controversies behind the science that's changing our world.
This week, Alice meets some of the AHOB team to explore the ancient inhabitants of Britain: when did they get here? Who were they? And how do we know?
AHOB, the Ancient Human Occupation of Britain, is a project which, over the past 12 years, has brought together a large team of palaeontologists, archaeologists, geologists and geographers, to pool their expertise in order to unpick British History.
The crumbling coast line has revealed the oldest examples of human life in Britain, 400,000 years earlier than previous findings of human habitation; and the ancient landscape had its share of exotic animals. Hippos have been dug up from Trafalgar Square, mammoths have been excavated from Fleet Street. Less glamorous than the big fossils, the humble vole is so useful and accurate as a dating tool that it has been nicknamed "the Vole Clock."
Listen to Inside Science
Tune in to BBC Radio 4 on Thursday 2 January at 16:30 to listen to this week's programme. More information and a link to listen again later will be available from the BBC's Inside Science pages.