Although Mercury was geologically active in its early days, today its surface appears almost completely static. This is why it is often perceived as a dead and dry planet. A new study led by Dr.

A new study suggests the smallest planet in our solar system is getting even smaller. The moon-sized planet is shrinking as its insides cool down. Mercury's diameter has declined by some 9 miles, and ...

Mercury doesn't give up its secrets easily. The smallest planet in our solar system is also one of the most extreme—a sun-scorched, metal-rich world with a puzzling magnetic field and lavas unlike ...

The closest planet to our sun, Mercury, experiences extreme temperature variations. Since the planet has no atmosphere to ...