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Fiber lasers mean ray guns are coming.

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R7Qra TIL Home Depot founder Ken Lagone and his wife donated $100,000,000 to fund free tuition for every student attending New York University's medical school
4G1o TIL during the civil war the man who chose the location for the Arlington Cemetery, Montgomery Meigs, a southerner who hated the confederacy, chose Arlington, Robert E. Lees family estate to remind him of the men he had killed, including Meigs’s son who was buried feet from Mrs. Lees rose garden.
9Ye1X TIL Circle A Ranch in Iberia, Missouri is cross-breeding Wagu beef and Angus beef to make Wangus Beef.
x6E40 TIL that 5 out of the last 5 mass extinctions were caused by large increases or decreases of atmospheric C02 levels
gMbjA TIL about the ancient art of Japanese woodworking joinery, none of which uses any nails.