A new study suggests a comet exploded in the sky 13,000 years ago. This event caused Earth's sudden cooling, known as the Younger Dryas. Large animals like mammoths vanished. The Clovis people disappeared. Evidence includes melted glass and shocked quartz found in ancient soil. This theory explains the abrupt changes without a ground impact crater.from Science News: Fresh Discoveries, Research & Breakthroughs https://ift.tt/9CTZtiV
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