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TIL the first photo of a black hole was taken in 1992

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1aNQX TIL that Pluto is so cold that it's covered in frozen Nitrogen ice. About 800,000 years ago, it may have been warm enough to have liquid Nitrogen flowing across its surface in lakes and rivers.
wYZW TIL North Korea and China signed a mutual defense agreement which says “the two nations guarantee to adopt immediately all necessary measures to oppose any country or coalition of countries that might attack either nation”
erL4 TIL most color laser printers sold today create an invisible code that records where and when a page was printed.
xVbWD TIL in the 60s Zambia planned to send "Afronauts" to land on Mars and the Moon. The Mars mission was planned to send a 'spacegirl', two cats and a missionary to convert the Martians to Christianity
4XoE5 TIL that Julius Caesar is thought to have suffered from epilepsy. He had one of these seizures during the decisive Battle of Thapsus where his veteran army even though outnumbered and without a leader managed to win the day .