Six North American sites hold 12,900-year-old nanodiamond-rich soil
Thursday, January 1, 2009 - 16:42
in Paleontology & Archaeology
Abundant tiny particles of diamond dust exist in sediments dating to 12,900 years ago at six North American sites, adding strong evidence for Earth's impact with a rare swarm of carbon-and-water-rich comets or carbonaceous chondrites, reports a nine-member scientific team.