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TIL: The word lens comes from lēns, the Latin name of the lentil (seed of a lentil plant) because a double-convex lens is lentil-shaped. The lentil also gives its name to a geometric figure.

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W7XZ4 TIL that The Sedlec Ossuary in the Czech Republic is a Roman Catholic chapel decorated with the skeletal remains of over 40,000 people. Originally a cemetery, it's now a well-known tourist spot.
Oopo4 TIL Thomas Jefferson made his own version of the Bible stripping Jesus of his divinity, miracles, and the resurrection and until the 1950s each newly elected US Senator received a copy.
XEWBE TIL of the N.S Savannah. A nuclear powered passenger/cargo ship built in 1961, that was intended to showcase to the world an example of the peaceful uses of nuclear power.
8vo8 TIL that in 1995 Kia was showing a range extended gas/electric (the Kev-4 concept car) with regenerative braking and solar powered air conditioner. It would drive on electricity alone for 117 miles. Its 880cc gas engine could stretch that farther. This was 15 years before the Chevy Volt.
1avAd TIL after Albanian citizens lost ~$1.2 billion (~$400 per capita) to Ponzi schemes in 1997, some of the losers started protesting against the government. The protests ultimately turned into a 6+ month civil war that toppled the government and killed 2000 to 3800 people.