Glittering stars in the night sky aside, scientists have long known that there are diamonds in the heavens. In 1981, for example, when Smithsonian researchers tried to cut through a large iron ...

With global temperatures on the rise, Swiss researchers found that diamonds in the sky would deflect sunlight back to space. The technique, also known as solar geoengineering, is already in use.

Using data from NASA’s MESSENGER spacecraft, scientists have identified a potential 10-mile-thick diamond mantle beneath Mercury’s crust. This finding suggests the planet may harbour more ...