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 ...

For decades, scientists believed lithium might be hiding in Mercury’s ultra-thin atmosphere, or exosphere, but every attempt to find it came up empty. Now, in a groundbreaking study, researchers have ...

BepiColombo is slowly uncovering more and more fun facts about Mercury as it continues its preliminary mission. One of the more interesting things found so far is a magnetic "chorus" that appears ...

CAPE CANAVERAL, Fla, May 7 (Reuters) - New results from NASA's now-defunct Messenger spacecraft show Mercury's magnetic field switched on about 4 billion years ago, scientists said on Thursday.

Mercury, Venus, and Mars sit within the same general neighborhood as Earth, yet each has followed a radically different path. One kept a magnetic field against the odds. Another trapped so much heat ...