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Mercury's crust points to deeper, hotter volcanic origins than expected

The evolutionary histories of Earth and Mercury differ fundamentally. The smallest planet, closest to the sun, likely began cooling early on, much like a setting pudding: As early as about 1 billion years after its formation, Mercury's volcanic activity came to a halt, and a solid, continuous "rock skin" formed on the planet's surface. Earth's crust, on the other hand, is still in motion:…

Mercury's crust points to deeper, hotter volcanic origins than expected

We haven't written up this one. Phys.org has the full story — the link below goes straight to it.

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