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Arctic sea ice is disappearing fast, and scientists have turned to an unexpected cosmic clue—space dust—to uncover how ice has changed over tens of thousands of years. By tracking helium-3–bearing dust trapped (or blocked) by ancient ice, researchers built a remarkably detailed history of Arctic cov
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Arctic sea ice is disappearing fast, and scientists have turned to an unexpected cosmic clue—space dust—to uncover how ice has changed over tens of thousands of years. By tracking helium-3–bearing dust trapped (or blocked) by ancient ice, researchers built a remarkably detailed history of Arctic coverage stretching back 30,000 years. Their findings reveal powerful links between sea ice, nutrient availability, and the Arctic food web, offering hints about how future warming may reshape everything from plankton blooms to geopolitics.