Global Warming (aka climate change) is nothing new! How often were there actually significan warm periods on Earth over the last let's say 100 million years?
Like Greenland when the Vikings arrived around 982 AD/CE.
Apparently, 100 million years ago Antarctica was located over the South Pole as it is today. Or in other words, it appears the geographic location of Antarctica did not change and could explain the warming period.
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