Mercury

Gene Expression
By Razib Khan
Jul 8, 2008 9:17 AMNov 5, 2019 9:30 AM
merc_span_600.jpg

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Flyby of Mercury Answers Some Old Questions:

Mercury, the smallest planet, bakes in the heat of the Sun, but it has water in some form. It has volcanoes. It appears to have an active magnetic field generated by a molten iron core. And it has shrunk more than scientists thought.

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