Impact hypothesis loses its sparkle

Shock-synthesized diamonds said to prove a catastrophic impact killed off North American megafauna can't be found.

New study reveals comet airburst evidence from 12,800 years ago

Researchers continue to expand the case for the Younger Dryas Impact hypothesis. The idea proposes that a fragmented comet smashed into the Earth's atmosphere 12,800 years ago, causing a widespread climatic shift that, among ...

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