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.



Comments
You forgot one; time literally moves slower on Mercury.
Posted by: Alan Kellogg | July 9, 2008 7:25 AM