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TIL that a successful attempt at breaking the altitude record for a helicopter resulted in an engine failure which led to a world record for the longest autorotation of a helicopter.

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nWyOb TIL there has only been 25 battles that involved opposing battleships since 1904. Three of those involved the USN, in which the US won all three decisively.
oB1Dr TIL: Leonard Nimoy only appeared once in public as Spock as the grand marshal of the Pear Blossom Parade in Medford, Oregon in 1967
ZpjXa TIL that the internet 'weighs' about as same as a large strawberry
bDma TIL All 5,000 miles of the US/Canada border is cleared for 20 feet so that no trees grow.
awZyM TIL that, to Escape Poachers, More Elephants are Being Born Tuskless