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TIL Charles Darwin’s cousin Francis Galton invented the dog whistle, meteorology, forensic fingerprinting and mathematical correlation. He also suggested that principles of animal breeding could be applied to humans, coined the word ‘eugenics’, and came up with the 'nature vs nurture’ idea.

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wA5M TIL that it was common belief in Medieval Europe that a magnet would lose its strength when in the presence of- among other things - garlic, goats’ blood and diamonds. This was disproved by surrounding a lodestone with 75 diamonds, then picking it up with a lump of iron.
XEgVX TIL When buttons were invented in the 13th century, wealthy women did not dress themselves — their lady’s maid did. As most people are right-handed, it was easier for maids to fasten with the buttons on the left. And that's why men's and women's buttons are on opposite sides.
woAx1 TIL that "Dinner" (the big meal) used to be around midday so artificial light wasn't needed, and then "Supper" was an evening snack. Dinner moved later in the day during the 18th century, until it was so late a new meal was needed to bridge the gap: "Lunch."
wMlE TIL that Cheech Marin beat both Anderson Cooper (Yale graduate) and Aisha Tyler (Dartmouth graduate) at Celebrity Jeopardy.
OomR4 TIL: Frank Sinatra recorded a unique version of “Lady is a Tramp” for Ringo Starr’s wife, which the Beatle presented to her for her birthday. It includes the line “She married Ringo, And she could have had Paul, That’s why the lady is a champ”