Topic: Megafauna Extinction

Randall Carlson challenges the overkill hypothesis, arguing that Paleo-Indian hunters could not have exterminated millions of mammoths and other species. He explains how the development of radiocarbon dating in the 1970s revealed that climate shifts at the end of the Ice Age occurred much faster than previously thought. Carlson cites the work of Louis Alvarez on the dinosaur extinction as a pivotal influence on his impact theories.

The presence of frozen mammoths with tropical food in their stomachs is presented as evidence of a sudden environmental shift. McLachlan argues that the Arctic was once a temperate region until a major atmospheric discharge event and the severance of the Saturn-Earth alignment caused a catastrophic freeze.