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TIL that in WWI, there were bicycle ambulances, made of two, three, or four bicycles with an attached stretcher. Two-bicycle ambulances were developed as early as the 1890s.

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l77D1 TIL MIT engineers made the first-ever plane with no moving parts by using electricity to ionize air (2018).
5V5N9 TIL Jay DeFeo created a work called "The Rose" that started at 9 x 7 feet. She would apply thick paint and chisel it away. It eventually was 11 feet tall and weighed over a ton. It was sealed in storage until conservators created a backing strong enough to support the heavy paint.
PQME TIL From 1980 to 2008, the number of people incarcerated in America quadrupled-from roughly 500,000 to 2.3 million people
4XMXN TIL 1816 was “The Year Without A Summer.” The dust from a massive volcanic eruption reduced sunlight for months, dropping temperatures and killing crops in North America & Europe. This indirectly led to the development of Mormonism, Frankenstein, and the modern bicycle.
4bRN TIL the heat from the Vesuvius eruption was so intense, the skulls of those caught in it literally exploded by the pressure of vaporizing brain tissue and boiling blood.