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TIL when Ken Mattingly lost his wedding ring during his trip to the Moon, Charlie Duke found it during a spacewalk on the voyage home

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ZpXp TIL that overweight and obese people now outnumber starving and malnourished people.
YYKZ TIL that deoxygenated blood isn’t blue, but actually dark red. Light refraction causes deoxygenated blood to appear blue.
M7QAA TIL That Pope Pius II wrote a best-selling erotic novel called "The Tale of Two Lovers" prior to his election as Pope. He is also known to have fathered two illegitimate children.
l7Ey5 TIL of ant-fungus mutualism. Leafcutter ants cut leaves and transport them back to their nests, where the leaves are used to cultivate fungus which is used as a food crop. In some advanced genera the queen ant may take a pellet of the fungus with her when she leaves to start a new colony.
gMd9b TIL of the Hadza people, whose ancestors have occupied the area surrounding the "Cradle of Mankind" for tens of thousands of years. Their oral histories are so ancient that it is possible they reference living alongside earlier extinct hominids such as Homo erectus