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TIL the albumen print used emulsion of (actual) egg whites and silver nitrate to bind the photographic chemicals to the paper.

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VBJyk TIL New Orleans was the wealthiest city in the US during 1830-1840. By the 1860's, New Orleans had the 3rd largest port in the nation and was 2nd overall in per capita income in the US.
1dK7 TIL that Helium is named after the greek god Helios because the first evidence of it’s existence was found not on earth but in the sun during a solar eclipse in 1868. It was not formally identified on earth until 1895.
wopDP TIL that beneath Grand Central Terminal in NYC lies a massive hidden basement called M42, which was once a WWII target. It remained secret for decades and is large enough to fit two football fields, housing key equipment for powering the terminal.
Wk7lY TIL The Janitor from "Scrubs" was meant to be part of JD's imagination in the first season, as a finale twist if the show was cancelled, which is why he does not interact with any other cast members that season.
0d0Jp TIL that before his involvment in the Nazi Party, Adolf Hitler was extremely lazy, never had a real job, dropped out of school and was very poor for many years. At one point he was sleeping on park benches and begging for money and later lived at a home for poor men for a few years.