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TIL Smoke Detectors mostly chirp in the dead of night because the chemical reaction in batteries slows down when the air get’s colder thus tripping the detectors low battery detector.

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J0a1 TIL of Agnes Milowka, a renowned cave diver who filmed stunts for the movie Sanctum. Not long after filming a scene for the movie in which an extra air tank is left behind in order to squeeze through a tight cave passage, she died after doing the exact same thing in a real cave.
nW5p7 TIL~2600 yrs ago in China, an ill king was predicted by a prophet that he won't live to eat the next harvest. When he was later presented with the new harvest and ready to eat it, he remembered the prediction and killed the seer, felt stomachache before eating, went to latrine, fell in and died.
BrGZD TIL the First Portuguese Republic, which lasted from 1910 to 1926, went through 44 prime ministers in those 16 years. That averages out to a new government every 4 1/2 months.
awoly TIL Robotic assisted surgeries have been done for more than 10 years. The Dr sits at a station in the operating room with a 3-D display and uses joystick-like controls to manipulate robotic arms, but does not physically touch the patient to perform the surgery.
OoLbR TIL A Saturday morning cartoon called ProStars starred three professional athletes from the 1990's - Michael Jordan, Wayne Gretzky & Bo Jackson. During it's 13 episode run, the show centered around the three athletes fighting crime, helping children, and often protecting the environment.