Killer cosmic rays from nearby supernovae could be the culprit behind at least one mass extinction event, researchers said, and finding certain radioactive isotopes in Earth’s rock record could confirm …read more Source:: Science
Tag: extinction event
In death of dinosaurs, it was all about the asteroid — not volcanoes
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•Volcanic activity did not play a direct role in the mass extinction event that killed the dinosaurs, according to an international team of researchers. It was all about the asteroid. …read more Source:: Science
The end-Cretaceous extinction unleashed modern shark diversity
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•A study that examined the shape of hundreds of fossilized shark teeth suggests that modern shark biodiversity was triggered by the end-Cretaceous mass extinction event, about 66 million years ago. …read more Source:: Science
Previously unknown extinction of marine megafauna discovered
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•Over two million years ago, a third of the largest marine animals like sharks, whales, sea birds and sea turtles disappeared. This previously unknown extinction event not only had a …read more Source:: Science