If you enjoy a good scare on YouTube, it's hard to go wrong with the MrBallen channel, where host John Allen recounts true ...

When strange music makes a girl vanish ... innocuous mezzotint depicting a grand country house. The tale takes a dark turn when the picture gradually changes, and a menacing cloaked figure ...

Dark energy is even more mysterious, and its discovery in the ... But that explanation still leaves scientists clueless as to why the strange force exists in the first place.

Astronomers have long been puzzled by two strange phenomena at the heart of our galaxy. First, the gas in the central ...