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TIL A Vicuña is a llama like animal that can only be shorn from every two to three years, thus producing the most expensive fabric in the world: vicuña wool.

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69VQZ TIL In 1939, Poland had over 3 million Jewish citizens. Today, it's between 25k and 100k.
gMVx8 TIL That the multi-colored lines associated with non-working TVs are known as a test card. I also learned that the test card for PAL (European, Brazilian, etc.) TVs is a different pattern, featuring multi-colored and many black-and-white lines in a circle.
9wJxr TIL Thomas Boylan built a cabin out of dinosaur bones in Wyoming in 1932. He died in 1947 and the cabin has since been offered for sale.
neRMd TIL halibut are born with one eye and nostril on each side of it’s head, but the left eye and nostril slowly migrate to the right side as the fish matures. This happens because the bones on the left grow faster than the right.
oDYL TIL In 2008, two researchers, a linguist and a sound engineer, found “the perfect male voice” to be a combination of Iron’s and Alan Rickman’s voices based on a sample of 50 voices. Coincidentally, the two actors played brothers in the Die Hard series of films.