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TIL “Superfecundation”. It is when two or more eggs from the same cycle are fertilized by sperm from different acts of sexual intercourse. This can lead to twin babies with separate biological fathers. It’s rare in humans, but common in cats and dogs.

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rNEQ0 TIL the US government owns 80.1% of all the land in Nevada, 61.3% of all the land in Alaska, and 24.7% of all the land in the US.
RJBw TIL that Tu Youyou, the first Chinese woman to win a Nobel Prize in medicine, developed a new malaria drug by finding a fever-fighting traditional herb mentioned in a 1,600-year-old text and then isolating the antimalarial compound in the plant.
8aKW4 TIL A media producer purchased a non-visible work of art called 'Fresh Air' for $10,000. The artwork does not exist in the real world. It only exists in the artist's imagination.
KMNB TIL most English translations of Jules Verne’s novels omit a lot of scientific exposition (sometimes entire chapters), replace lots of dialogue with short summaries, censor supposedly “anti-British"or"anti-American” sentiment, add many errors, and sometimes add whole new scenes.
e0gWk TIL a 1967 study showed that only 38% of people were able to identify recordings of their own voice within 5 seconds.