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TIL that hippo sweat contains a chemical that has an SPF factor to prevent them from getting sunburned.

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neMYd TIL that Keanu Reeves is determined to not let his tragic life deter him from helping society and that he secretly funds Children’s Hospitals, cancer research, and much more
7rAML TIL Bob Barker actually did his own stunts for Happy Gilmore, including the famous fight scene. Not only did he refuse to do the movie until he found out he won the fight, but he also studied Tang Soo Do karate under Chuck Norris for 8 years.
J1Rj8 TIL the first satellite navigation system, Transit, was operational in 1964, only 7 years after the Sputnik-1 launch
VM5OG TIL Einstein’s theory of special relativity explains why a star can burn for billions of years without running out of fuel. If you can measure potential energy by multiplying mass by the speed of light squared, that means an average adult stores 30 large hydrogen bomb explosions worth of energy.
0w4bA TIL the only thing that stopped the Spanish from colonizing the plains of what would become the United Stated was the Comanche Indians who’s particular brand of ferocity and violence defeated the Spanish army time and time again. Thus, forcing a peace treaty.