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TIL The microscopic structures of dried human tears differ according to the type of crying:the molecular structure of tears of grief are different from tears of joy.

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wRM7 TIL that a placebo pill can work even when you know it’s a placebo
Kea9 TIL bridges can be made from the roots of living trees. These Root Bridges takes at least 15 years to build, but is automatically strengthened over time and can last centuries.
WakA TIL: El Chapo would pick an elegant restaurant, Diners would politely be demanded their telephones, promising that they would be returned at the end of the evening. Chapo would come in and feast, return the telephones, pick up the tab for everyone, and head off into the night.
4Xdg6 TIL Our sky is actually violet, but it appears blue because the cones in the human eye aren’t as sensitive to violet.
N7GkP TIL that half the rice grown in California is the offspring of a mutant strain created in the early 1970s by radiation breeding