Most frozen mammoth theories use the presence of these mammoths corpses as evidence for some catastrophic event in the past: pole shift, near miss by rogue planets, explosion of errant ice moon, Noah’s flood, or its aftermath. They agree that the mammoths were all frozen in a single event. If the mammoth is truly a separate species from other elephants (many theories say it is not), then the catastrophe was the cause of their extinction. The Hollow Earth theory is different.

