Antarctica was warm enough for rainforest near south pole 90m years ago

Experts say new evidence from Cretaceous period 'shows us what carbon dioxide can do'

Think of Antarctica and it is probably sweeping expanses of ice, and the odd penguin, that come to mind. But at the time of the dinosaurs the continent was covered in swampy rainforest.

Now experts say they have found the most southerly evidence yet of this environment in plant material extracted from beneath the seafloor in west Antarctica.