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TIL the sun is made up of plasma where hydrogen accounts for about 73.4% of the total mass or 92% of the total number of atoms. The other basic building block is helium, which accounts for 25% of the mass or 7.8% of the total number of atoms. Every second 6 million tons of hydrogen turns into helium

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P9Mg TIL That adult Luna Moths develop without a mouth, their only purpose is to mate within their 7-day lifespan. After which they die of starvation.
poRO TIL newborns start at the age of 1 in China and other east-asian cultures. And at the beginning of Lichen(event during February) one year is added to the person’s age. So people may be one or two years older in the ‘Asian reckoning’ traditional system than in the Western system.
7rg5Z TIL of Ben Sliney, who started his new job on 9/11/2001 and had to make the decision to ground every flight across the US airspace
nWPaG TIL that, using money earned from a 1961 biography of his brother Ernest, Leicester Hemingway created a micronation called New Atlantis on a 240 square foot raft off the coast of Jamaica, where he lived with his wife and young children. It lasted five years before it was destroyed in a storm.
XERLE TIL That medieval European monks were required to maintain their tonsure (bald spot), and each monastery would usually hire or train a barber. Being skilled with razors, barbers would also perform surgical procedures for the monks. They would eventually be recognized as the first 'barber-surgeons'.