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TIL Astronauts use white space suits in space as white reflects the solar radiation. However, while heading to space or coming back, they wear an orange space suit so that, if there's a malfunction and astronauts have to abandon ship, they need to be easy to spot for rescue crews.

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a8L8y TIL of Israel Epstein, a Jewish Polish-Chinese journalist who gained intimate access to Mao Zedong’s inner circle and was one of the few foreigners to gain Chinese citizenship.
jNYbX TIL that the red-eye effect in pictures is literally blood in our eyes. If a picture is taken when our pupils are dilated, they don't have enough time to constrict and the light reflects off the blood in the back of our eyes.
E1ABo TIL of Alice in Wonderland Syndrome. Most commonly found in children, sufferers experience sensory distortions, such as feeling their heads are far from their bodies, hearing amplified or altered sounds, hallucinations, and a feeling of depersonalization or separation from one's own body.
p8RvQ TIL of Helios Airways flight 522. A loss of cabin pressurisation incapacitated the crew, leaving the aircraft flying on autopilot - a flight attendant with flying experience used an oxygen tank to stay conscious and tried to pilot the plane
awa4J TIL 50s Movie Director Ed Wood was a secret cross dresser whose SO did not know, he made and starred in a movie about about a secret cross dresser whose SO did not know and cast his real life SO as the movie character's SO. She eventually rejected him in real life, just as her movie character did.