Blame a swarm of comets striking North America 12,900 years ago for the environmental disaster that caused the extinction of mammoths and many other species, say scientists quoted in a CNN report.
“The nanodiamonds that we found at all six locations exist only in sediments associated with the Younger Dryas Boundary layers, not above it or below it,” said University of Oregon archaeologist Douglas Kennett. “These discoveries provide strong evidence for a cosmic impact event at approximately 12,900 years ago that would have had enormous environmental consequences for plants, animals and humans across North America.”
An earlier theory advanced to explain the mass extinction in North America of half of the animal species weighing more than 100 pounds is that when Man migrated over the Bering land bridge, he ate all of them. Not on the very first day, of course.
I don’t know if I’m ready to abandon that theory, either. I find it incredibly easy to believe after a nonstop week of Christmas-to-New-Year’s feasting.