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 ...

"We calculate that, given the new estimate of the pressure at the mantle-core boundary, and knowing that Mercury is a carbon-rich planet, the carbon-bearing mineral that would form at the interface ...

Simulations of Mercury's childhood suggest the runt of the Solar System may have inherited a fortune in the form of a 15-kilometer (9-mile) thick layer of solid diamond. Sandwiched between the core ...

Diamonds aren't the traditional 20th anniversary gift, but we're not going to complain, since these came from a spacecraft that crashed into the surface of Mercury back in 2015. NASA's MESSENGER ...