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TIL a Hollywood actress, Hedy Lamarr, invented the basis for modern WiFi and bluetooth in 1941

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l79RB TIL the US army had a robot with a teddy bear face designed by VECNA.
grxwL TIL that the SI unit of time equal to one million years is called a megaannus. Its larger versions are the gigaannus and the teraannus.
ZpyDG TIL about Tetrachromats - people with a special receptor in their retinas that allow them to see millions of colors that most of us can’t distinguish!
7rpVp TIL the pineapple became a sign of hospitality during America's colonial era. The exotic fruit was an expensive treat originally served to only the most-honored guest. Towns, inns and individual households began displaying images of the fruit in order to convey a sense of welcoming.
wvrW TIL the kale salad with dressing at McDonald’s has more calories than a Double Big Mac