March 1040 in history

Died in March 1040

Mar 6 Alhazen an Arab, Muslim, scientist, polymath, mathematician, astronomer and philosopher who made significant contributions to the principles of optics, astronomy, mathematics, meteorology, visual perception and the scientific method.
Mar 17 Harold Harefoot King of England from 1035 to 1040. His cognomen "Harefoot" referred to his speed, and the skill of his huntsmanship. He was the younger son of Cnut the Great, king of England, Denmark, and Norway by his first wife, Ælfgifu of Northampton