Tiny metallic beads hiding in deep Arctic mud have reignited a long-running argument about why Earth shivered 12,800 years ago. The new evidence comes from four sediment cores lifted out of Baffin Bay, between Greenland and Canada, that capture a razor-thin layer rich in comet-like debris. The abrupt climate lurch, known as the Younger Dryas, drove Northern Hemisphere temperatures down …
Read More »Metallic beads suggest a comet slammed into Earth not long ago
