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TIL The spire on top of the Empire State Building was originally designed for docking aircrafts. The 102nd floor is observatory you can still access. 103rd floor which now is used for storage and equipment has a small door that leads to a narrow spiral staircase to the top.

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vG4L TIL a Canadian Research Firm has developed Invisible Camouflage, and is sharing it w/ the U.S. Government.
D1ZKr TIL of Wei Jie. A frail youth who lived in 3rd Century AD China, he was considered to be so beautiful that hordes of admirers mobbed him/his home all day, which caused him to die of stress. "Wei Jie died of stares" is now a Chinese idiom describing celebrities who have very obsessive fandoms.
rRbx TIL that of the women nominated for Best Comedy Actress, three of them have played Liz Lemon (Tina Fey, Amy Poehler, and Julia Louis-Dreyfus)
4kaDJ TIL That the only 18" gun the US Navy developed, was used as ballast on a hospital ship (USS Repose), but never deployed on a battleship.
yVKyV TIL that in the late 1700's people thought tomatoes were poisonous because rich people ate them on pewter plates which were made of lead