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
Because of the great effort that would have been required to produce each stone spearhead, hunters would have been unlikely to leave them behind.