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TIL that when a shark is flipped on its back it enters a state of paralysis that lasts for up to fifteen minutes. The phenomenon is known as “Tonic Immobility.” In some cases orcas have been seen maneuvering a shark upside down to induce this paralyzed state.

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R5lLw TIL that Robert Fulton's steamship was named North River Steamboat, and that the name it's popularly called today, Clermont, was due to an error in a biography of Fulton. No accounts of the vessel being called Clermont during Fulton's lifetime have been found.
9wlxm TIL that in 2013, a woman named Asha Mandela broke the world record for the longest dreadlocks, measuring over 55 feet long. She claims that her hair has healing powers and has helped her survive cancer.
BggXW TIL in the 60s, Lady Bird Johnson persuaded her husband to steer a bill through Congress titled The Beautification Act of America. As a result from this law, the insulators, arresters, and transformers on electric poles were painted sky blue/grey.
E1pGw TIL while the Apache Wars ended with the surrender of Geronimo in 1886, the last Apache raid into the United States occurred in 1924, and the Mexican Indian Wars continued for another nine years, until the final holdouts were defeated in 1933.
MeOd0 TIL The Greek Navy maintains a fully operational replica of an ancient Trireme, the HS Olympias