Thanks Apeman! How could I forget?
BTW, saw an episode of Nova: Polar Extremes (https://video.kqed.org/video/polar-extremes-mfaum5/) which included a segment on climate change. In the last 500 million years ago, it is more common to have a warm climate than a cool climate. Humans have only existed, in any form, during a cooling period. We haven’t been around for a warming period.
So, tell me, my mockers, if we’ve only been around for this “warming” period…what caused all the others?