A new study reveals that supernova explosions may have caused two mass extinctions on Earth 372 million and 445 million years ...
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Talker on MSNSupernova study suggests space blasts wiped out ancient life on EarthScientists say a supernova explosion close to Earth could be to blame for two extinction events. The post Supernova study ...
Exploding stars known as supernovas may have sparked mass extinctions that wiped out up to 85% of animals on Earth.
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