The lost Roman city of Pompeii was rediscovered by a Spanish engineer Rocque Joaquin de Alcubierre.
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The Royal Canadian Air Force was formed out of the Canadian Air Force.
The Bolivian city of PotosĂ was founded after vast deposits of silver were discovered in the mountains nearby.
Bonnie and Clyde shot two highway patrolmen outside Grapevine, Texas.
The TIROS satellite transmitted the first-ever TV picture from space.
NASA celebrated April Fool's Day by telling the world that they found water on Mars.