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TIL: of the foldscope. A microscope that provides magnification from 140X to 2,000X. It is assembled from a punched sheet of cardstock, a spherical glass lens, a light emitting diode and a diffuser panel, along with a watch battery. It is designed to cost less than US$1 to build.

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rR8ge TIL 17th century twerking where "young wenches" indulged in a "wanton sport" called "moulding of Cocklebread" where they would "get upon a Tableboard, and […] they wabble to and fro with the Buttocks as if they were kneading of Dough with their Arses"
A4wo TIL to eliminate all the elusive invasive goats in the Galapagos, researchers attached a GPS to a ‘Judas goat’ who would, because of its gregarious nature, seek out other goats. It was then tracked down, the group killed, but with the 'traitor’ left alive to repeat the cycle.
r0Ly TIL space has been continuously occupied by humans for 14 years 316 days as of today.
VyQ0 TIL cracking your knuckle joints doesn’t give you arthritis. Dr Donald Unger cracked the knuckles on his left hand, twice a day for 50 years but not on his right hand. He proved his mother wrong and received the Ig Nobel Prize for his research
WkA6L TIL: Domino's Pizza Released A Video Game In 1989, Called "Avoid The Noid"