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TIL that the main component of the Earth's upper mantle is a yellow-greenish mineral called olivine.

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e0rXk TIL that Jews were often blamed and persecuted for being the cause of the Black Plague.
9wvDB TIL of the single tax movement (aka geoism or georgism), an economic ideology where that the government should be funded by a tax on land rent rather than taxes on labor
4kbdR TIL in the 1340s Oxford had an estimated murder rate of roughly 110 murders per 100,000 people, and in the 14th-century, London's murder rate varied between 36-52 per 100,000 people. By comparison, the 2020 murder rate for Britain was around 1 per 100,000 people.
mxgLv TIL Researchers have uncovered the earliest evidence of a person being hit and killed by a meteorite falling to Earth, which killed one person and injured another, occurred in what is now Sulaymaniyah, Iraq, on Aug. 22, 1888.
WnLd TIL Louis Armstrong asked Richard Nixon to carry his bags through customs for him because he ‘was an old man’. The bags had marijuana in them.