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TIL Rust Doesn't cause Tetanus. Tetanus, or lockjaw, is a bacterial infection caused by Clostridium tetani, an extremely hardy rod-shaped bacterium found in animal digestive tracts and soil worldwide. Humans can be exposed to Clostridium tetani in a variety of non-rusty ways, such as animal bites.

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x6NJD TIL that Magnesium helped advance photojournalism. The first photography flash, a powder mix of Mg & potassium, created bright light when ignited. Jacob Riis was an early adopter and used it to document life in the often dark NYC's tenements. His work sparked public outcry, and then housing reforms
Y7XmA TIL That Anthrax is not a poison but rather an infectious disease that naturally occurs in the world and can also be recreated in a lab
oBGxK TIL that Jeremy Rossman dropped out of MIT in 2011 to start his own college, Make School. The young college offers a project based bachelors degree in computer science that involves working with companies on current, real world problems. Students only pay tuition if they are hired upon graduation.
e06OD TIL that when Queen performed for the first time in Australia, at the Sunbury Pop Festival in 1974, they were continuously booed by the crowd, they went on to finish their set with Freddie Mercury yelling to the crowd "When we come back to Australia, Queen will be the biggest band in the world!"
R5nJ7 TIL of the 1991 Downing Street mortar attack, in which IRA members launched three mortars at No. 10 Downing Street during a cabinet meeting, attempting to kill John Major. One hit the lawn 30 yards away, and it is believed that if this mortar had hit the building the entire cabinet would have died.