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Colossal Asteroid, 20 Times the Size of Dinosaur-Killer, Struck Solar System’s Largest Moon 4 Billion Years Ago
Four billion years ago, Ganymede literally got knocked sideways. A giant asteroid slammed into Jupiter’s largest moon, ...
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Asteroid 20 times bigger than dinosaur killer altered Ganymede's position
The thought of an asteroid impact is scary enough, let alone witnessing one. One such impact killed the dinosaurs 65 million years ago, and now it seems another space rock had a dramatic effect on ...