Chaotic Orbits Could Cause Catastrophic Collision

Researchers used ancient climate cycles to confirm the solar system’s chaotic planetary orbits. An Earth–Mars collision is one distant outcome.

Listen to the podcast at Scientific American’s 60-Second Science.

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An artist’s rendition of a past collision between Earth and a Mars-sized object that is thought to have created the moon. (Credit: NASA/JPL-Caltech)
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