Challengers to Clovis-age impact theory missed key protocols, new study finds
Tuesday, September 18, 2012 - 15:00
in Astronomy & Space
An interdisciplinary team of scientists from seven US institutions says a disregard of three critical protocols, including sorting samples by size, explains why a group challenging the theory of a North American meteor-impact event some 12,900 years ago failed to find iron- and silica-rich magnetic particles in the sites they investigated.