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TIL that a study in 1976 concluded that there is between 20-60mg of protein per ml in Semen.

Read more pubmed.ncbi.nlm.nih.gov

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yQaAV TIL that the U.S. government accepts donations. An account to accept donations was established in 1843 to accept gifts from individuals "wishing to express their patriotism to the United States".
m1mbE TIL In English law priests used to be allowed to commit one murder and face no further consequences beyond having a thumb branded. These benefits of the clergy would be reduced in 1512 and heavily altered by the end of the 1500s.
RJ6a TIL that goldfish are a completely manmade species and have no natural habitat. Originally domesticated as food, they began being selectively bred for their color—the result of a genetic mutation. Today, their color, size, shape, and fins are the result of thousands of years of selective breeding.
R71o6 TIL Jupiter, Uranus and Neptune all have ring systems
W9AB TIL that there’s a rare, discontinued kind of firearm (pistols, rifles) that shoots tiny ROCKETS instead of bullets!