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「大量絶滅」巨大噴火が哺乳類を生んだ

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Published on Feb 18, 2007

2億5千万年前、95%の生物が大絶滅した。
原因は地球中心部からわき上がった
直径千キロの火の玉・スーパープルーム
による巨大噴火。

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