Ocean acidification caused a mass extinction of marine life 66 million years ago. The current climate crisis is also making the oceans more acidic:
Slightly less than 66 million years ago, a giant asteroid hit the earth near the Mexican town of Chicxulub, leading to massive tsunamis, earthquake-driven gravity flows and the ejection of molten rocks, according to a new paper published in the journal Proceedings of the National Academy of Sciences. This in turn caused acid rain and large scale acidification of the world's oceans, prompting a mass extinction of most marine and land based life, including all dinosaurs.
A culpritRead MoreThey found that the shell walls had become very thin because of a sharp drop in the pH of the oceans -- a sign of acidification -- a 100 to 1,000 years after the strike. This demonstrated that the asteroid impact was the main culprit for making the oceans more acidic and causing a mass die-off of marine life, the researchers said. Intense volcanic activity had also been considered as a possible cause.
France Dernières Nouvelles, France Actualités
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