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TIL that British comedian Tony Hawks became so frustrated with being mistaken for pro skateboarder Tony Hawk that he has published a book called "Tony Hawk's The A to Z of Skateboarding" that contains nothing about skateboarding.

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epaB6 TIL that Brazil nuts have an elevated amount of selenium (68-91 mcg per nut), and having too many of them can cause the body selenium to increase above the acceptable limit. Extremely high levels of Brazil nuts can cause a condition known as selenosis, which is even characterized by heart attacks.
9DDB TIL During the Battle of Stalingrad, Soviet losses were great enough that at one time, the life expectancy of a newly arrived soldier was less than a day and the life expectancy of a Soviet officer was three days.
Jb9v TIL: After losing his wife from breast cancer, a 57 year old man with a prior heart attack attempted to run 75 marathons in 75 consecutive days for single parent awareness. He succeeded.
69ABw TIL that in 2019, U.S company BIOLIFE4D 3D printed a miniature human heart with many of the same functions and structures as a real, full-sized human heart.
eprdD TIL a group of flamingos is called a "flamboyance."