On November 3, 1965, Major Robert Rushworth made the first flight of the modified X-15A-2 rocketplane, reaching Mach 2.31 ...

This week, researchers published LIGO findings that hint at the existence of second-generation black holes. Astronomers captured a spectacular new image of the Milky Way across a wide range of radio ...

The proof, known to be so hard that a mathematician once offered 10 martinis to whoever could figure it out, uses number ...