Study rebuts hypothesis that comets destroyed Clovis culturetags: pre-Columbian America, Clovis culture, impact events, climate science, ScienceDaily
Jan. 30, 2013 — Rebutting a speculative hypothesis that comet explosions changed Earth's climate sufficiently to end the Clovis culture in North America about 13,000 years ago, Sandia lead author Mark Boslough and researchers from 14 academic institutions assert that other explanations must be found for the apparent disappearance.
"There's no plausible mechanism to get airbursts over an entire continent," said Boslough, a physicist. "For this and other reasons, we conclude that the impact hypothesis is, unfortunately, bogus."
In a December 2012 American Geophysical Union monograph, first available in January, the researchers point out that no appropriately sized impact craters from that time period have been discovered, nor have any unambiguously "shocked" materials been found....
comments powered by Disqus
- T. rex fossils arrive at Smithsonian’s National Museum of Natural History
- Quote of the Day -- Time Magazine's Top 100 People
- Investigation: The Resegregation of America's Schools
- 5 Explosive Revelations Leaked from Senate Report Exposing CIA Torture
- In Parts of the South, Glorifying Slavery No Longer Pays the Bills
- UC Berkeley professor emeritus Robert Harlan dies at 84
- She Came All the Way from Melbourne to Attend the OAH
- The 7 Most Popular HNN Videos from the 2014 OAH
- Jesse Lemisch’s up-from-below history is still strikingly original
- U.Va. Historian Alan Taylor Wins 2014 Pulitzer for Book on Slaves and War -- His second Pulitzer!