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TIL astronauts need to sleep near air vents or risk carbon dioxide from their own lungs forming a bubble around their head due to weightlessness.

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9YGZG TIL every Shih Tzu alive today can be traced to one of 14 dogs — seven males and seven females — that were used to rebuild the breed when China underwent its Communist Revolution.
oLEL TIL when the first horse was cloned, she was implanted with the clone embryo and later gave birth to a carbon-copy of herself.
awgXN TIL it only takes 42 seconds to grill a McDonald's hamburger patty on a double-sided grill. So technically no one has a job "flipping" burgers at McDonald's.
QJOE6 TIL Juries have 12 people because of Jesus and his Twelve Apostles
ggZb TIL that Japanese handsaws cut on the pull stroke, which is more efficient, whereas American handsaws cut on the push stroke.