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The second largest mass extinction in Earth's history, was caused by a sudden anoxic event in oceans; lasted for 1 million years, driven by global cooling
OftenBen
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ooli
pnas.org
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New Research Suggests Galaxies Like the Milky Way Contain Wandering Supermassive Black Holes
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Dala
astronomy.com
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The Worsening Cosmic Ray Situation
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mk
spaceweatherarchive.com
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