Professor Richard Fortey looks at how some species survived the ice age which began 2.8 million years ago, triggered by changes in the Earth's orbit around the sun. Show more
Discover 11,128,835 listings and 278,066 playable programmes from the BBC
Professor Richard Fortey looks at how some species survived the ice age which began 2.8 million years ago, triggered by changes in the Earth's orbit around the sun. Show more