Are Mass Extinctions Periodic, And Are We Due For One? (Synopsis)

Are Mass Extinctions Periodic, And Are We Due For One? (Synopsis)

-Christopher Hitchens65 million years ago, a catastrophic impact from outer space caused the last great mass extinction on Earth, destroying 30% of the species that lived on our world at the time. These mass extinction events happened many times in Earth’s past, and the Solar System also passes through denser stellar regions of space periodically, as determined by the orbit of the Sun and stars in the Milky Way. It’s a combination of facts that might make you wonder whether the extinction events are also periodic, and if so, whether periodic impacts are predictable. Image credit: Wikimedia Commons user Albert Mestre, with data from Rohde, R.A., and Muller, R.A. Are mass extinctions periodic?

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