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TIL that Australia has opened an underwater museum inside the Great Barrier Reef

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LbR0 TIL that a solid 8 hour sleep is actually unnatural to us as a species. A 4 hour sleep, waking for 1-2 hours, followed by another 4 hour sleep is how we slept for the majority of evolution. The change to a solid 8 hour sleep was originally attributed to improvements in lighting and other things.
vPNdr TIL that we can smell ants. Many species of ants release strong-smelling chemicals when they’re angry, threatened or being squished. Trap-jaw ants release a chocolatey smell when annoyed, while citronella ants earn their name from the lemony odour they give off.
69A9Q TIL that during World War II, publication of the Michelin Guide was suspended. In 1944, at the request of the Allied Forces, the 1939 guide to France was specially reprinted for military use; its maps were judged the best and most up-to-date available.
9YDjB TIL Rubik's cube has 43 quintillion combinations, and you are never more than 20 moves away from the solution.
GYMZ7 TIL: While the Europeans brought Smallpox to the Americas, the Native Americans gave the Europeans syphilis, leading to the disease's introduction to europe in 1495