Thanks! A comet impact that blasts away atmosphere and exposes the surface of the earth to outer space and extremely cold temperatures might explain findings of frozen wooly mammoths with flowers in their mouths in Siberia. (Must be true! read it on the internet!) Will have to look for info on that later.
The question is, how given anything like the standard version of Earth history, did vast herds of such large creaturesever find food when the entire territory is covered by ice ten months of the year? Elephants are gluttonous; they spend most of their wakinghours eating, in fact, McGowan has stated that he does not understand how anythingever ate enough to get bigger than elephants since there would not appear to be time inthe day for it.