‘Earth Burp’ of methane May Have Caused Mass Extinction 200 mil years ago, Not Volcanic Activity

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The methane release likely originated from the sea floor, according to the study, and added a huge amount of carbon to the atmosphere, killing many species.

The gas was releases over a period of 600,000 years,

In the past, scientists believed the reason for this extinction could be linked to an increase of carbon dioxide in the atmosphere.

However, this doesn’t change any theories about how the dinosaurs went extinct. Last month scientists uncovered further evidence to suggest that they were killed by a meteorite, and were roaming Earth at the time of impact.

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