When did the Aztecs arrived in the Valley of Mexico? When were the Mayan pyramids built? When did the Aztec Empire end? When was the Sumerian calendar used? When was the Egyptian calendar made? When was the Babylonian calendar created?
When was the lightbulb invented? When did Hypatia invent the astrolabe? When was the electric lamp invented? When was the first digital alarm clock invented? When was the street light invented? When was the magnetic compass invented? When was electricity invented?
The first eyeglasses were estimated to have been made in northern Italy, most likely in Pisa, by about1290: In a sermon delivered on 23 February 1306, the Dominican friar Giordano da Pisa (c. 1255–1311) wrote "It is not yet twenty years since there was found the art of making eyegla...
I don’t know if Nicolaus Copernicus was eating oxtail soup, looking at an apple falling from a tree, or cleaning his astrolabe when he thought up his theory of the revolution of celestial spheres, set down in his bookDe revolutionibus orbium coelestiumin 1543. But his superior insight, part...
Honeymooners have endless options: They can hole up at their private pool, head out for a sunrise fishing expedition, go diving amidst the famous Great Astrolabe Reef or book a sunset cruise for two. But at the end of the day, most couples relax the same way – with cocktails at the...