The Antikythera mechanism is an ancient mechanical computer designed to calculate astronomical positions. It was recovered in the early 20th century from a wreck near the Greek island of Antikythera, but its significance was not recognized until decades later. It is thought to have been built in the 2nd century BCE. Technological artifacts of similar complexity did not reappear until more than a thousand years later. Its degree of mechanical sophistication is comparable to what devices?
John F. Kennedy
Back in the day
North American Aerospace Defense Command, commonly abbreviated NORAD, is a bi-national command of the US and Canada that maintains the sovereignty of North American airspace by providing aerospace surveillance as well as warning and assessment of aerospace attacks. Headquartered deep inside Cheyenne Mountain in Colorado, NORAD was formed in 1958 during the Cold War to provide security in the event of a Soviet nuclear attack. What false alarms have occurred since its inception?
Born on a day like today
Hepburn made her Broadway debut in 1928 and became a star with her first film, A Bill of Divorcement, in 1932. She brought a spirited individuality and strength of character to the screen in her roles in films such as Bringing Up Baby, The Philadelphia Story, and The African Queen. She made eight films with her longtime partner Spencer Tracy, eventually starring in 43 films. No actress has ever won more Academy Awards than Hepburn. How many did she win?