(Left) A colorful view of Mercury produced using images from the color base map imaging campaign during MESSENGER's primary mission (Right) what Mercury may look like were its outer layers stripped to ...

(CNN) — 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.

Mercury has long been cast as the solar system’s burnt-out rock, a relic too small and too close to the Sun to hold many ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Mercury, seen in this false-color image, may have a deep layer of inner diamonds, new research ...