› added 4 years ago

172

TIL Newspaper cleans windows better than microfiber rags and paper towels!

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via reddit.com

4knkw TIL that horseshoe crabs have blue blood that detects pathogens, and they're being hunted for it to extinction!
R7NA1 TIL that a Greek man named Heron Alexandrinus, who was born in 10AD, invented the first steam engine, called an Aeolipile. His design was forgotten and never used until 1577.
v1pb8 TIL Over 140 Polish pilots flew in the British Air Force during the Battle of Britain, making them the largest non-British nationality in the force. 2nd was New Zealand, and 3rd was Canada. Nearly a quarter of the pilots that fought for the RAF and RN in the Battle of Britain were not British.
R5kV1 TIL that Po Boy Sandwiches originated in New Orleans, and are derived from fried oyster sandwiches, called Oyster Loaves. A wide selection of fillings include roast beef, ham, shrimp, sausage, french fries and fried chicken. A "dressed" po' boy has shredded lettuce, tomato, pickles, and mayo.
M7Adb TIL South San Francisco (a city distinct from San Francisco) does not border San Francisco at all. In fact, they're not even in the same county. Several cities separate the two.