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TIL the most decorated American WWI veteran from Texas was an undocumented Mexican immigrant named Marcelino Serna. He was also the first Hispanic to be awarded the Distinguished Service Cross

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j6ZVa TIL: OSAM-1 is a NASA spacecraft designed to test on-orbit refueling of satellites. Its launch is currently planned for no earlier than 2025. Its first objective would be the complex refueling of Landsat 7, an existing satellite launched in 1999.
rRbgw TIL: The juried art competitions of the Olympics were abandoned in 1954 because artists were considered to be professionals, while (at the time) Olympic athletes were required to be amateurs.
XEeE6 TIL the U.S. Army has the most overweight troops out of all the military branches
8aW4L TIL of chemist Carl Scheele, known for discovering oxygen, molybdenum, tungsten, barium, hydrogen, and chlorine, as well as organic acids, died at just 43 as a result of the cumulative effect of exposure to arsenic, mercury and lead. Despite his discoveries, for years others were given credit.
gr8Xb TIL Canadian Bank notes have various resources in place for the blind and partially sighted, including a tactile feature for symbol system differentiating between bills.