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TIL Catherine Stevens, wife of then Sen. Ted Stevens (R-AK) was held at an airport as "Stevens, Cat" was on the no-fly list. Her husband was chair of airline regulation but she was held before boarding due to her name resembling the former stage name of the singer Cat Stevens.

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EapV TIL Red heads require 20% more anaesthesia then normal during surgery
8egNV TIL: Surgeons in ancient India, around 600 BCE, performed cataract surgeries using a curved needle to remove the cloudy lens. The procedure was described by the physician Sushruta in his medical texts, making it one of the earliest known surgical practices in human history.
4oR5 TIL that the first automated telephone exchange was created by Almon B. Strowger, because a competitor’s wife was the operator of his local exchange, and therefore redirected calls meant for him to her husband’s business instead.
W741d TIL about Giant Rock, a 7-story high freestanding boulder in the Mojave Desert. It's purported to be the largest freestanding boulder in the world.
LQbyQ TIL that some turtles can breathe through their butts, a process known as cloacal respiration.