The ‘@’ sign is centuries old, and was used in Europe to denote a unit of weight (the “arroba”) equivalent to 25 lbs.
11
Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
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It's still possible to see the division between East and West Germany due to different light bulbs.
5
A monk had once written over a book that contained information about calculus that was written by Archimedes in ancient Greece that could have made us 100 or even 1000 years more mathematically and technologically advanced.
13
Beethoven, was told by a music teacher that he had no talent for music. In fact, this teacher once remarked, “As a composer he is hopeless.”
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