A recently discovered gold pendant appears to date to a "mysterious moment" in the early 8th Century, according to an expert.

The flashes of light were taken during the Palomar Sky Survey, a project that mapped the northern sky between 1949 and 1958.

Researchers have found evidence of a previously unknown asteroid impact, but the crater is still at large. The clues of this bygone cataclysm consist of tektites—a type of natural glass that forms ...

A new study suggests dark matter near the Milky Way’s center is flattened, possibly explaining its mysterious gamma-ray glow.