YR4, which orbits the sun every four years and periodically crosses Earth's orbit. The nature of its orbit makes it a ...
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The Daily Galaxy on MSNDiscovery of Megaripples Beneath Louisiana’s Seafloor Reveals New Clues from Dinosaur-Killing Asteroid ImpactThe incredible aftermath of the Chicxulub asteroid impact—one of the most cataclysmic events in Earth’s history—is unfolding ...
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