Anthropology professor Vance T. Holliday and others take issue with claims that a comet strike led to the demise of Paleoindian megafauna hunters during the Pleistocene.
The notion of an object such as a comet or asteroid
striking the Earth and wiping out entire species is compelling, and sometimes there's good evidence for it. Most scientists now agree that a very large object from space crashed into what is now the Yucatan Peninsula in Mexico 65 million years ago, altering climate patterns sufficiently to end the age of the dinosaurs.
The theory was backed up by supporting evidence, and while not everyone in the scientific community was on board at first, it's now generally accepted.
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