Nov 19, 2020
7 min read
Living in an Ice World
Why did the earth start cooling 34 million years ago?
Earth sweltered in greenhouse heat for 226 million years, starting in the late Permian and ending in the early Oligocene. Polar icecaps and ice sheets were unknown, and tropical plants often grew from pole to pole. Looking at images of Antarctica today, it’s hard to imagine a continent with tropical shorelines and warm ocean breezes…
