Mercury Flyby Reveals Active (but Shrinking) Core [News]
Thursday, July 3, 2008 - 13:14
in Earth & Climate
The first flyby of the planet Mercury in more than 30 years is resolving some long-standing puzzles about the closest planet to the sun. Among the findings: the planet's iron-rich core seems to be shrinking, causing its crust to buckle and crack. [More]