Mercury's cratered surface is younger than its age

07/5/2013 | Space.com

Scientists studying the surface of Mercury say the planet could be missing the first 500 million years of its surface, showing its age to be 4 billion to 4.1 billion years old, rather than it's formation age of 4.5 billion years old. The study finds that Mercury may have lost its older surface to early volcanic eruptions or asteroid impacts that pounded away the planet's surface.

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