The geologic time record shows a pretty noticeable drop in this time frame, before the glacial period started & temperatures started swinging up & down. https:/

The geologic time record shows a pretty noticeable drop in this time frame, before the glacial period started & temperatures started swinging up & down. https://en.wikipedia.org/wiki/Geologic_temperature_record#Overall_view https://en.wikipedia.org/wiki/Geologic_temperature_record#Ov...