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TIL rubbing alcohol makes open wounds sting because it lowers the temperature threshold of heat-detecting VR1 receptors--so much so that your own body heat triggers a burning sensation

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Z0Oa TIL the arctic vortex hitting the U.S., and the drought in California are caused by unusually warm water temperatures near the Gulf of Alaska.
R71p4 TIL Anne Frank wrote about the changes her body was going through in her diary, but her dad edited those parts out of the published manuscript.
Bg4jy TIL there are approximately only 6,674 cheetahs in the wild today and only 5% of cheetah cubs make it to adulthood. The key factors of their decline are habitat loss, exotic pet industry, poaching for their skin, and conflicts with farmers. Currently, they exist only 10% of their historic range.
WkdJ8 TIL that water droplets expelled my the mouth become airborne more easily in cold, dry conditions. This partially explains why the spread of viruses tends to be seasonal.
97MM TIL the expiration date on bottled water is for the bottle, not the water.