Mercury is a planet of impossible contradictions. It’s scorching hot, yet we’ve found ice at its poles. It’s small and barren ...

A layer of diamonds up to 18 kilometers (11 miles) thick could be tucked below the surface of Mercury, the solar system's smallest planet and the closest to the sun, according to new research. The ...

Mercury is the innermost and smallest of the eight major planets in our Solar System, orbiting closest to the Sun. Though ...

If you've never sighted this rocky little world for yourself, you'll never get a better opportunity than right now to see it.

What do many baked goods and the planet Mercury have in common? They shrink as they cool. Evidence suggests that since it formed about 4.5 billion years ago, Mercury has continuously contracted as it ...