California's Channel Islands hold evidence of Clovis-age comets
EurekAlert (press release) - 1 hour ago
"These diamonds have only been found thus far in meteorites and impact craters on Earth and appear to be the strongest indicator yet of a significant cosmic ... (more)
Did a Comet Cause a North American Die-Off around 13000 Years Ago?
Scientific American - - 1 hour ago
The controversial theory also gibes with the 1908 Tunguska atmospheric detonation (also thought to be from a comet or meteorite) that leveled trees in ... (more)