Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A layer of diamonds ...

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 ...

Mercury is a world of extremes: scorching surface temperatures, polar ice, a surprisingly strong magnetic field, and a metallic core that defies expectations. Discover how Mariner 10’s groundbreaking ...

The diamonds might have formed soon after Mercury itself coalesced into a planet about 4.5 billion years ago from a swirling cloud of dust and gas, in the crucible of a high-pressure, high-temperature ...