› added 2 years ago

80

TIL mayday as a distress call is French M'aider.

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erZk TIL that above 19,200m (63,100ft) above sea level, the body hits the Armstrong limit. At this point you’ll suffocate to death no matter how much air you inhale because the liquid wetting your lungs to let you breathe will boil away at body temperature, and is a major reason for pressurised suits.
d8gR7 TIL Gail Brewer Giorgio, whose 1978 novel "Orion" was about a singer who faked his own death. Her novel was compared to Elvis Presley theories and recalled. The rest of her career was spent writing books questioning if Elvis was really dead, appearing on talk shows and having a 900 number about it.
YbpZ TIL That North Koreans can only choose from 28 hairstyles that are approved by their government
P1ZgL TIL that photosynthesis doesn't recycle CO₂ into oxygen, the oxygen actually comes from water. Plants break down water (H₂O) to consume the hydrogen necessary to make sugar, and release the oxygen. The CO₂ is never broken down, plants just use it as a building block to make larger carbon compounds.
W7opB TIL that Diet Coke contains a good bit more caffeine than regular Coca-Cola. A 20oz bottle of Diet Coke contains 70mg of caffeine compared to 53mg of caffeine in the regular version.