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TIL There Are 2 Pieces of Aluminum from the Destroyed World Trade Center on the Surface of Mars. They were quietly built into 2 of the Mars Rovers.

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via reddit.com

xGy0 TIL that there is a theory by reputable physicists that the universe is made up of one electron that is moving forward and backward in time.
VMb1p TIL that we owe the iconic Star Wars' opening text to Brian De Palma. After seeing an early cut of A New Hope, he strongly complained to George Lucas, calling the movie "non-sense". The idea for an introductive crawling text came from the ensuing exchange.
4knO5 TIL our stomach produces about 3 to 4 liters of gastric juice per day
b9k17 TIL that you absolutely can pick up baby birds and their parents will not reject them as a result.
aQAL TIL that the Japanese created Nightingale floors that “chirped” when walked on for security.