Paleontology. Experts find no evidence for a mammoth-killer impact.
Kerr
Richard A
RA
D000818:Animals; D002980:Climate; D018130:Diamond / Q000032:analysis; D004606:Elephants; D053476:Extinction, Biological; D019015:Geologic Sediments / Q000737:chemistry; D055593:Geological Phenomena; D005844:Geology; D006801:Humans; D007495:Iridium / Q000032:analysis; D019110:Meteoroids; D010163:Paleontology
D007495:Iridium; D018130:Diamond