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TIL The reason men have nipples is because foetuses grow as a female until the Y chromosome kicks in but by that time, the nipples have been created.

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p1WN TIL Switzerland banned nearly all forms of motor-racing after the tragic 1955 Le Mans disaster, where fragments of a crashed car flew in the stands, killing 83 spectators, the most deadly accident in motorsport history. Despite numerous attempts to lift it, the ban is still in place to this day.
P1KlV TIL that white, black, and green, and red peppercorns are all derived from the same plant, Piper Nigrum. Pink peppercorns, however, do not.
QJm46 TIL that poop should sink, not float. A floating poop is a sign of poor absorption of nutrients or excessive gas.
jWoN TIL artist Binh Danh develops photographs directly on to leaves, using the natural combination of chlorophyll and sunlight. Also, TIL that’s possible.
wAgW TIL of an indoor vegetable factory in Japan that produces up to 10,000 heads of lettuce per day and uses just 1% of the amount of water needed for outdoor fields