Comet impact may have triggered decline of Ohio's Hopewell people 1,600 years ago

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Comet impact may have triggered decline of Ohio's Hopewell people 1,600 years ago
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The Hopewell are the ancestors of the Haudenosaunee and the Algonquin peoples.

This expansive reach is perhaps the reason why so many modern Native communities across the United States have stories about a comet streaking across the sky — a dramatic event that may have severely disrupted the Hopewell culture a millennium and a half ago. In a new study, a team led by Native American anthropologist Kenneth Tankersley analyzed sediments near 11 Hopewell archeological sites and found micrometeorites, tiny fragments shed by a visiting comet.

Tankersley added that the Wyandot people also recount a dark cloud that rolled across the sky and was destroyed by a fiery dart.are fascinating objects that take lengthy trips around the sun. Some comets have orbits that last tens of thousands of years, for instance, and this is what makes observing them so singularly special. As a comet comes into Earth's view, it also nears the sun, whose heat melts the comet's ice and may trigger the shedding of material as outbursts.

People in China observed many comets during that time, for example."Between 1,800 and 1,431 years ago , Chinese astronomers documented 69 near-Earth comets … includingThen there is the physical evidence. According to Tankersley, the micrometeorites found at the Hopewell sites are rich in platinum and iridium, two elements that appear in impact craters.

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