In the 1980s, astronomers proposed that the Sun actually had an evil trouble-making twin called Nemesis that swings past the solar system every 26-27 million years.

Its gravitational turbulence sends a cloud of comets hurtling our way. And it’s possible that the twin was the culprit that kicked an asteroid into Earth’s orbit, which eventually collided with our planet, triggering the fifth mass extinction event that wiped out the dinosaurs.

But the question is that if Nemesis is out there, where do we search for it?

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