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TIL that 22 monuments that would have been flooded by the construction of the Aswan Dam in Egypt were physically relocated by an international campaign created by UNESCO. The success of the campaign eventually led to the creation of the system of World Heritage Sites.

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OAl7 TIL researchers tweaked a computer’s learning system so that it would read the manual for Civilization and adjust its strategy according to the information. The machine won 79% of the games it played, compared to 46% for a machine that didn’t read the manual.
ZKZ4 TIL experimental Thorium nuclear fission isn’t only more efficient, less rare than Uranium, and with pebble-bed technology is a “walk-away” (or almost 100% meltdown proof) reactor; it cannot be weaponized making it the most efficiant fuel source in the world
7r7RM TIL that Leopold Amery, Winston Churchill's own Secretary of State for India, wrote in his private diaries, "on the subject of India, Winston is not quite sane" and that he didn't "see much difference between [Churchill's] outlook and Hitler's."
XEpwk TIL In November 2012, Salvador Alvarenga went fishing off the coast of Mexico. Two days later, a storm hit and he made a desperate SOS. It was the last anyone heard from him – for 438 days
N7oZ1 TIL under the Open Fields doctrine the U.S. government has the authority to place cameras and other surveillance devices on your land without your consent or the need for a warrant