The Younger Dryas Impact Hypothesis posits that a comet hit Earth 12,800 years ago, causing temperatures int he Northern Hemisphere to plummet back to near-glacial ...
Examples of Fe-rich and silica-rich impact microspherules (a and b) and metallic dust particles (MDPs; c and d) interpreted as cometary dust from Baffin Bay cores. Yellow arrows show particles of FeSi ...
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