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How a distant planet might have caused mass extinctions on Earth

How a distant planet might have caused mass extinctions on Earth

Business Insider - Corey Fedde

The theory might seem like science fiction, but a study by astrophysicist Daniel Whitmire offers scientific data to back up the claim. Dr. Whitmire, who now teaches math at the University of Arkansas, says the mysterious planet has been causing extinction events at regular intervals - every 27 …

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