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TIL about Mabel Ping-Hua Lee (1896-1966), a Chinese-American suffragette. At the age of 16, she was invited to help lead a march of 10,000 people up Fifth Avenue.

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60M7 TIL Albert Einstein’s son, Hans, was a famous hydraulic engineering professor who developed important equations for sediment transport in rivers. When reporters asked Albert what he thought of his son’s career, he replied, “He is working on a more difficult problem”
WkyZd TIL that medieval moats served not only the purpose of being a physical barrier, but when water-filled were also able to prevent enemies from tunneling and undermining a wall, by saturating the ground making tunneling very difficult.
69pxl TIL that Toyota Motor Co was originally named after it's founder Toyoda, but the name was changed to Toyota because it sounds better and in Japanese characters it is 8 strokes, a lucky number, versus the 10 strokes for Toyoda. (Obviously in Japanese, not anglicized spelling)
okOo TIL Eric Schimdt had the following to say on what Google can do: “One day we had a conversation where we figured we could just try and predict the stock market… and then we decided it was illegal. So we stopped doing that.”
lo1M1 TIL A French doctor lured as many as 60 Jews into his home under the pretence of safety from the Nazi occupiers. He then killed them with his own gas chamber.