Those are not all time records, Old Guy. 21,000 years ago, at the peak of the last Glacial Period, Chicargo was under a mile of ice.

Climate change is not new, but normally happens slower than this, and factors such as variations in the Earths orbit are responsible, not man-made Carbon Dioxide.

Don, It is entirely possible that continenetial drift would not have been taught when Old Guy was at school. It was proposed as a theory in the 30's, but only proven in about 1965-67.