Perkins: According to an article I read, the woolly mammoth's extinction in North America coincided with a migration of humans onto the continent 12, 000 years ago, and stone spearheads from this period indicate that these people were hunters
But the author' s contention that being hunted by humans contributed to the woolly mammoth's extinction is surely wrong since, as paleontologists know, no spearheads have ever been found among the many mammoth bones that have been unearthed
At sites where mammoth bones dating from 12, 000 years ago have been unearthed, bones of other mammals have rarely been found.