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TIL a 2009 study compared 8,000 archived blood samples from a 1950s USAF base, and 12,000 modern samples. They found celiac disease to be 4x more common in the modern samples.

Read more ncbi.nlm.nih.gov

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WoZ4 TIL Frank Sinatra’s mother ran an illegal abortion business from her home.
b66Z9 TIL that the USA now recognizes a 5th ocean - Southern / Antarctic (in addition to the Atlantic, Pacific, Indian, and Arctic)
RnK8 TIL that the Greater Honeyguide, a bird from sub-Saharan Africa, leads humans to bee colonies and, after we take the honey, feeds on the larvae and beeswax. It seems to only use humans and likely evolved this behaviour with early men. Honeyguides may be mankind’s oldest buds, even before dogs.
AN7nl TIL of the Boy Scout Nuclear Science Merit Badge. The requirements to receive the badge include building a Geiger counter, planting irradiated and nonirradiated seeds, and visiting an accelerator (research lab) or university where people study the properties of the nucleus or nucleons.
w8K1 TIL that there is a single Cashew tree in Natal, Brazil that has a mutation which allowed it to cover an area of 7500 square meters