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TIL that not all cheese is vegetarian

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via reddit.com

5Y9dR TIL: The wings of dragonflies prevent bacterial growth due to their natural structure. The surfaces of their wings are covered in nanopillars making them look like a bed of nails. When bacteria come into contact with these surfaces, their cell membranes get ripped apart immediately.
l7YJG TIL JFK's sister, Rosemary, was subjected to a prefrontal lobotomy when she was 23 years of age by request of her father. It left her incapacitated and unable to speak intelligibly. The Kennedy family did not explain her absence until 1961, where they said it was on account of "mental retardation".
7rx6P TIL foxes utilize the earth's magnetic field as a targeting system to find prey
APR4 TIL that The Strip, the thing Las Vegas is most famous for, is not actually located within the city of Las Vegas. It is in an adjacent unincorporated area of Clark County known as Paradise, Nevada.
npr7 TIL Norway imports garbage from other countries to generate energy.