Our Galactic Neighbors Once Collided, New Observation Suggests

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Should you find yourself in the southern hemisphere beneath dark skies, look up: You’ll see two faint, glowing smudges beside the vast, glowing trail of our Milky Way galaxy. These two Magellanic Clouds are galaxies, too, though smaller ones orbiting our own. And some time in the past, perhaps back in the dinosaur…

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https://gizmodo.com/our-galactic-neighbors-once-collided-new-observation-s-1830097492