A new study supports the theory that volcanoes — not asteroids — trigger the most extreme mass extinction events.
, aka the Great Dying, was the deadliest mass extinction event in the history of our planet.
Keller and a team of researchers compared the asteroid theory with a similar theory that states that volcanic activity actually produced the cold-inducing covers of atmospheric ash, resulting in the five extinction events. Ultimately, their comparison found that four of the five events corresponded with enormous volcanic explosions that flooded large swaths of the planet in lava in only a million years’ time or less.
After identifying these enormous eruptions, the team then used supercomputers to analyze their timing with that of past extinctions, including the five mass extinction events. To verify that any correspondence between the timing of the two represented causal connections rather than coincidences, the computers then tested whether the volcanic activities would coordinate with 100 million randomly generated patterns at a similar level.
In addition to this overlap in time, the researchers also found that the periods with the worst rates of eruption also corresponded to the periods with the worst rates of extinction. This suggests that the worse the explosion, the worse the extinction.
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