Mercury, the smallest and innermost planet in our solar system, may be home to a dazzling secret hidden beneath its scorched surface—a diamond layer up to 11 miles thick. A groundbreaking study, led ...

A rare volcano in Tanzania, Ol Doinyo Lengai, may hold the key to understanding the enigmatic bright pits known as “hollows” ...

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 ...

Mercury does not look like a world built for extravagance. It is small, battered, sun-scorched and gray. Yet far below that dark surface, the innermost planet may hold one of the stranger planetary ...