Alexander III of Macedon, commonly known as Alexander the Great, was a king of the ancient Greek kingdom of Macedon and a member of the Argead dynasty. He was born in Pella in 356 BC and succeeded his father Philip II to the throne at the age of 20. Read More
An international team of researchers has observed a gamma-ray burst with an afterglow that featured the highest energy photons - a trillion times more energetic than visible light - ever detected in a burst. ...