Krech also contradicts Martin’s exclusion of climatic change as an explanation by asserting that widespread climatic change did indeed occur at the end of the Pleistocene.
A则加入了我们的主观推断:"Paleoindians consumed a large amount of animals and caused their extinction" is different from "Paleoindians were primarily dependent on hunting for survival", right?
Krech also contradicts Martin’s exclusion of climatic change as an explanation by asserting that widespread climatic change did indeed occur at the end of the Pleistocene.