Comment by tonytran2015: But if the climate remained that cold human may not have evolved or may need to burn outrageous amount of fossile fuel to keep themselve warm.
This 2019 video says about itself:
The History of Climate Cycles (and the Woolly Rhino) Explained
Throughout the Pleistocene Epoch, the range of the woolly rhino grew and shrank in sync with global climate. So what caused the climate — and the range of the woolly rhino — to cycle back and forth between such extremes?
Ancient genomes suggest woolly rhinos went extinct due to climate change, not overhunting
August 13, 2020
Summary: Although overhunting led to the demise of some prehistoric megafauna after the last ice age, a new study found that the extinction of the woolly rhinoceros may have been caused by climate change. By sequencing ancient DNA from 14 woolly rhinos, researchers found that their population remained stable and diverse until only a few thousand years before it disappeared from Siberia, when temperatures likely rose too high.
The extinction of prehistoric megafauna like…
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