Scientists are uncovering new clues that a cosmic explosion may have rocked Earth at the end of the last ice age. At major Clovis-era sites, researchers found shocked quartz—evidence of intense heat ...

New research suggests a comet explosion helped cause ice age extinctions, sudden cooling, and the loss of early human cultures.

(Santa Barbara, Calif.) — Researchers continue to build on a body of evidence for a fragmented comet that is thought to have exploded over the Earth almost 13,000 years ago, which may have had a role ...

A fragmented comet was thought to have exploded over the Earth almost 13,000 years ago and could explain a massive ...