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TIL that the legendary SR-71 'Blackbird' has plans for a successor, the SR-72 'Son of Blackbird'; this craft would be capable of reaching Mach 6. In 2018, Lockheed Martin announced they would have a working prototype by 2025.

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9wV07 TIL about the 'Sacamantecas' (Spanish for "Fat Extractor"), a bogeyman in Spanish folklore similar to the sack man, based on Manuel Blanco, Spain's first documented serial killer who abducted people to extract their body fat and make soap.
XEwkE TIL Over 14 months, artists in Mexico turned a low-income neighborhood into one giant mural, painting the facades of 200 homes bright lavender, lime green, & incandescent orange.
Bgw8K TIL the last time a supernova (a powerful and luminous explosion of a star) was visible with the naked eye was in 1604. Known as "Kepler's Supernova", it was so bright it was visible during the day for a period of three weeks.
vgd4 TIL Hitler’s brother lived in Liverpool and had a son, Patrick William Hitler, who joined the US army during WW2
0wD5 TIL tens of thousands of shirts are made for both teams saying they won the Super Bowl. The shirts of the losing team are sent to the Dominican republic.