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Mercury Is Shrinking Way Faster Than We Thought, Scientists Discover
TL;DRMercury's radius shrank 4-6 miles more than scientists previously thought.
Why it matters: Revises our understanding of planetary cooling mechanics and interior composition across the solar system.
The planet’s radius may have shrunk by between four and six miles since it was formed due to global cooling, a contraction that is up to 30 percent larger than previously estimated.
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