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TIL the song “Ireland’s Call” was commissioned in 1995 to be used as the anthem for Ireland’s national rugby team since the team consists of Republican and Northern Irish players who are technically from two different countries.

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0wJ9M TIL A rare mutation among the Bajau people lets them stay underwater longer: natural selection at the PDE10A gene has increased spleen size in the Bajau, providing them with a larger reservoir of oxygenated red blood cells.
78eP7 TIL sucking on your SO's (F) nipples can cause irregularities in periods and is also a method of (extremely unreliable) contraception. Sucking on the nipple releases the hormone prolactin, which causes the brain/body to think there is already an suckling infant and will try to delay the next.
b9X09 TIL The New Hampshire Astronomical Society donated over a dozen telescopes to local public libraries around the state so they can be put into circulation just like a book. Their 4.5-inch telescopes shows the Moon and deep sky objects in far more detail than common "beginners" telescopes
JYDpl TIL A WWI soldier injured in France in 1917, went on to marry the nurse that mistook him for a German spy and advised surgeons to take his life on the operating table. He accidentally spoke German to doctors while under a fever, and she took it as spy language. They were married for over 50 years.
dJxr TIL that since the first atomic bomb was exploded in 1945, over 2000 nuclear weapons have been detonated by 8 different nations in 60 different locations worldwide.