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TIL There is a measuring device specifically designed to determine the volume of testicles. It is called an Orchidometer.

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1aDrV TIL Cruentation, the understanding that dead bodies would bleed in the presence of their murderer, was a common belief in the Middle Ages.
REX6 TIL the smell of freshly cut grass is actually a plant distress call.
oBp48 Til that if adjusted for inflation,The Birth of a Nation(1915) is the first ever film to gross a over a billion dollars,at 1.8 billion dollars gross(in modern money),making it the forth highest grossing film ever.
VMRD4 TIL Uranus and Neptune are easy to spot in binoculars. Uranus might even look greenish, thanks to methane in the planet’s atmosphere. Once a year, Uranus is barely bright enough to glimpse with the unaided eye
5Y9kr TIL flashing a light at the right frequency temporarily cleared up plaque of peptide amyloid-β in the brains of mice. This plaque build up is characteristic of Alzheimer's disease and clearing it temporarily suppressed its symptoms in the mice