Early Eocene. Palm trees grow in the Antarctic, crocodiles splash around in the shallows of England. The climate is significantly warmer than today. This shows that a very warm climate doesn’t necessarily mean problems for life. On the contrary, it could mean more species living in the long term (though not necessarily including Homo sapiens). Nearly every species on the planet today is adapted to the cold, due to the repeated ice ages over the past million years.
