The smallest planet in our Solar System may be hiding a big secret. Curious bright streaks on Mercury's surface, doodled on ...

Mercury has long been cast as the solar system’s burnout case, a small rocky world that cooled quickly and then froze in ...

Mercury has always been a bit of an oddball planet. With about half the mass of Mars but roughly the size of the Moon, and a ...

Learn about the bright streaks that may represent recent geological activity on Mercury, which has been considered a dead ...