› added 4 months ago

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TIL sailing ships around Iberia have been the subject of coordinated Orca attacks beginning in 2020.

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64KQ TIL That the X-rays from an atomic bomb are so powerful, they can compress lithium until it causes a fusion explosion… even without the shockwave. Its called a “Teller-Ulam” nuclear weapon, and it uses an atomic bomb as a “spark plug”.
gM74X TIL Motorboat Racing Has an International Governing Body
R5Lg6 Today I learned the Seikan Tunnel connecting the Japanese islands of Honshu and Hokkaido is the world’s longest undersea tunnel with a total length of 53.8k/33.5mi and is only utilized for rail service.
BrgNb TIL that using a countdown in rocket launches was invented as a dramatic device for a 1920s movie, then later borrowed by NASA for real life launches.
wLpLJ TIL On July 21, 1861, the first major battle of the American Civil War, known in the North as the First Battle of Bull Run and in the South as the Battle of First Manassas, also earned the nickname the “Picnic Battle” because spectators showed up with sandwiches and opera glasses to watch the battle