Did a meteorite impact North America at the end of the Ice Age

That's what some scientists think, on light of the many micro-diamonds and other impact debris found at certain geological layer dated some 12,900 years ago across North America. They sustain that this event caused the extiction of megafauna and the end of Clovis culture.

Others are skeptical though, arguing that such a widespread distribution appears to violate our understanding of cosmic impacts.