380: Theodosius I makes his adventus, or first formal entry, into Constantinople

1639: 1st observation of Transit of Venus by Jeremiah Horrocks and William Crabtree – helped establish size of the Solar System

1642: Dutch explorer Abel Tasman is the first European to discover Van Diemen’s Land (Tasmania)

1859: English naturalist Charles Darwin publishes “On the Origin of Species” radically changing the view of evolution and laying the foundation for evolutionary biology

1950: UN troops begin an assault intending to end Korean War by Christmas

1954: France sends 20,000 soldiers to Algeria

1974: Most complete early human skeleton (Lucy, Australopithecus) discovered by Donald Johanson, Maurice Taieb, Yves Coppens and Tim White in the Middle Awash of Ethiopia’s Afar Depression

Source: Onthisday.com