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TIL: People paid to have their mail delivered to them until March 3rd, 1863 when the US Congress established free mail delivery to cities. New York City delivered residential mail 4 times daily until 1940. NYC reduced residential mail delivery to once daily (due to high costs) in 1950.

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yQ8nV TIL that Koko the signing gorilla liked human nipples so much that three staff members sued the organization that housed her for being forced to reveal their nipples to Koko.
N1LP TIL that after 21 years, Trent Reznor is finally going to release the soundtrack from the video game “Quake” as an album on vinyl. No solid release date is yet given but release is expected “this year” according to Rolling Stone magazine.
0loA TIL the Titanic’s coal stores had been burning for weeks before she set sail, damaging the starboard side of the ship where the iceberg hit. There was not only a cover-up, but evidence that the fire damaged the hull enough to be a large contributing factor to why the iceberg caused such damage.
OoWrX TIL the Zawiyyet al-Mayyiteen in Egypt, dubbed the “City of the Dead,” is one of the world’s largest cemeteries. Made up of numerous white conical domes that stretch out across a wide plain, the necropolis looks similar to waves in the sea. The cemetery was used by Muslims and Coptic Christians.
VMgoD TIL that Archimedes estimated the value of pi with a polygon in a circle in a polygon. He made the diameter of the circle 1, so the circumference was pi. With the circle's diameter, he found the perimeters of the polygons. Therefore, the value of pi (the circle's circumference) is in between them.