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TIL George Lucas's original name for Yoda was... Buffy

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0OV5 TIL that the pacemaker, fridges, WiFi and Google Maps are all Australian inventions.
JY5Ej TIL that there’s a rival to a black hole; a white hole! Except for sucking up energy it expels it back into the universe!!
awe8Z TIL The tomb of Genghis Khan (died August 18, 1227) has been the object of much speculation and research. To This Day, 800 years after his death, the site remains undiscovered.
OkpX TIL a voting system exists that lets you select candidates in order of preference. Votes “roll over” from a losing candidate to the next preferred. This “political average” overcomes flaws of single-ballot voting.
lon7 TIL that if you draw a line around some Ants, they won’t cross it. Calcium Carbonate in chalk will puncture their skin and kill them with dehydration