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TIL: Lululemon yoga pant fabric costs $4.50

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GAW65 TIL windsocks (like those used at airports and heliports) are often used at industrial buildings that use ammonia as a refrigerant so emergency responders know which areas are downwind if there’s a leak
KYEOJ TIL of the Ford Turbine-Powered Semi-Truck called "Big Red" which was introduced at the 1964 World's Fair, found its way into private hands and was restored instead of being crushed.
DoMP TIL there is a molecular gyroscope, a chemical compound in which a molecule can spin at 2,400,000,000,000 revolutions per second
7r7bb TIL although the actual size of most mammals – including humans – is mostly set from birth, there are many other animals, such as fish, amphibians, lizards, and snakes which are known as "indeterminate growers." They never stop growing.
b6G7a TIL Harry Houdini died on Haloween due to Appendicitis. While giving a talk at McGill university, a student asked to confirm a rumor that he could resist punches. The student then proceeded to punch Houdini with no time to prepare for the trick, which is believed to have ruptured his appendix.