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TIL the mechanism behind night vision isn’t the dilation of our pupils, it’s actually a pigment known as Rhodopsin. It gets destroyed by light and takes the eye 45 minutes to replenish.

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eZ64 TIL of the GMO apple that doesn’t brown after it’s been sliced
XEBdR TIL In 1961, a handful of the world's top scientists gathered at the Green Bank Observatory in West Virginia, to give Dolphins LSD. They noted as soon as the dolphin on LSD had contact with another intelligent mammal, it wouldn't shut up.
QXwE TIL that a war refugee from Montenegro came to New York and began working at Columbia University as a janitor. He used Columbia’s tuition remission for employees to earn a bachelor’s degree in classics. It took him twelve years.
R598j TIL the skeleton of Josef Mengele, the German doctor who conducted horrific experiments on thousands of Jews at Auschwitz, is stored at the São Paulo Institute for Forensic Medicine, where it is used as an educational aid.
VMQdm TIL that the Vietnamese word for the country of Italy is simply the letter "Ý".