Paleontology. Mammoth-killer impact gets mixed reception from Earth scientists.
Kerr
Richard A
RA
D000818:Animals; D002980:Climate; D003469:Culture; D018534:Earth, Planet; D004606:Elephants; D053476:Extinction, Biological; D019015:Geologic Sediments / Q000737:chemistry; D006801:Humans; D007495:Iridium / Q000032:analysis; D008670:Metals / Q000032:analysis; D019110:Meteoroids; D010163:Paleontology
D008670:Metals; D007495:Iridium