A new study advise the hypothesis of Clovis comet - a giant celestial body collision with the Earth, which occurred nearly 13,000 years ago, which is completely erased from the face of the planet ancient North American Clovis culture.
An international team of scientists from seven institutions of the United States argues that the neglect of three key protocols, including sorting the samples by size, explains why the team, the disputed theory that Clovis comet, did not find the iron-rich and silica-magnetized particles in the places that she explored.
In a new independent analysis were isolated large quantities of so-called "microspherules" in the same places where the past research found nothing. Lead author of the new Malcolm Le Compte (Malcolm A. LeCompte), an astrophysicist at the State University Elizabeth City, North Carolina, said that these findings support the theory of cosmic collision that led to climate change, but his team is not enough data to officially announce on the proof of the event.
The study was published online last week in the Early Edition of the Proceedings of the National Academy of Sciences.