From one collapsing star, two black holes form and fuse

Black holes—massive objects in space with gravitational forces so strong that not even light can escape them—come in a variety of sizes. On the smaller end of the scale are the stellar-mass black holes that are formed during the deaths of stars. At the larger end are supermassive black holes, which contain up to one billion times the mass of our sun.

HTC launches the "One"

HTC has rolled out its new flagship "One" smartphone housed in a zero-gap aluminum unibody.

Metallica's One & Johnny's Got His Gun

Like many Metallica fans, I once waited with bated breath to see the world premiere of the band's first video, One, on MTV.