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TIL that people with red hair are more sensitive to pain and more resistant to local anesthesia due to the MC1R gene. They may require up to 20% more general anesthesia (such as Novocaine)

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V9d0 TIL Northwest Airways saved about $500,000 a year by slicing limes into sixteen slices rather than 10.
m1X6v TIL a pregnant belly can explode.
neJpd TIL William Shockley, a co-inventor of the transistor, decided to cease silicon-based research. The remaining researchers disagreed with him and went on to form Intel, AMD and National Semiconductor.
R7mLa TIL PowerPoint is Turing Complete
l7gV TIL Spiders can travel in jet streams at altitudes exceeding 16000 ft above sea level