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TIL that the speed of light was first measured accurately in 1676 by Danish astronomer Ole Rømer using observations of Jupiter’s moons, without modern technology

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E17wx TIL that the ISS or the International Space Station at an average altitude of 400 kilometers/248 miles above Earth and circle the globe every 90 minutes at a speed of about 17,500 mph or 28,000 km/h.
ZK0D TIL that on May 30th 1883, a woman tripped on the Brooklyn Bridge, sparking panic that the bridge was collapsing. The resulting stampede ended with 12 people dead and more than 35 wounded.
8aO14 TIL that in the 1840s, San Francisco a pair of stray dogs known as Bummer and Lazarus were such good rat catchers that they became famous in the city. Once, when a new dog catcher caught Lazarus, an angry mob formed. The city not only released him, but exempt both dogs from anti-stray laws.
W7pad TIL: When people act like Frankenstein's monster, they often stretch their arms out in front of them because of the 1943 movie Frankenstein Meets the Wolf-Man. In the movie the monster is blinded and has to walk holding his hands in front of him.
0gr1 TIL you are allowed to bring your own parachute on a US commercial flight.