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TIL When you look into a Hadza mouth there's 20 back teeth while the rest of us tend to have 16 erupted and working. Hadza also typically have a tip-to-tip bite between the upper and lower front teeth, the edges of their lowers align to form a flawless arch. The size of Hadza teeth match perfectly.

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MoZV TIL 10-18 million Africans were taken by Arab slavers. This is more than the 12 million Africans shipped in the Atlantic slave trade, and 16-30 times more than the 600,000 slaves imported to America since 1620, which is less than the more than 1 million whites enslaved by Ottoman vassals.
neowG TIL: Pringles are not truly a potato chip but a "potato crisp" as they are made from a dough and fried. The can was developed by a engineer who wrote Fantasy Fiction and used a super computer to assure the shape and size of the can for minimum breakage on movement.
wolM7 TIL A New Ligament in the Human Knee was Discovered in 2013
1aD5O TIL real human skulls are traded on Instagram by a small but active underground collectors’ market. The skulls are decorated and sold by macabre enthusiasts. Some sell for tens of thousands of dollars.
9nvG TIL the largest plane to ever successfully land and take off from an aircraft carrier was a C-130 named “Look Ma, No Hook” to brag about how it needed neither an arresting hook nor a catapult assist.