As if blazing comets pounding into the earth and wiping out giant lizard monsters isn’t metal enough, now some scientists are speculating that “dark matter” may have played a role in the great dinosaur die-off. The scientists theorize that as our solar system circles around the center of our galaxy it might pass through a dark matter “disc” every 35 million years. The disc might send comets flying our way. Me? I think I’ll call it the Loc-Nar theory of mass extinction.
Its name has always made it sound ominous – and now dark matter could have a menacing role in Earth’s history. A recent explanation for the identity of the mysterious stuff leads to a scenario in which it could be to blame for the extinctions of dinosaurs, or at least send a few extra comets shooting our way.
Although the sequence of events connecting dark matter to dinosaurs, or even comets, is still pretty tenuous, it is intriguing because it brings together two big open questions: the identity of dark matter and whether there is a pattern to comet strikes on Earth.