› added 1 year ago

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TIL that Phantom Islands appeared on maps but later found not to exist. They often stem from early sailors' reports, navigational errors, or deliberate fabrications, and some lingered on maps for centuries before being debunked.

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M7MMA TIL in 2007 scientists discovered Sildenafil (Viagra) helps treat jet lag recovery in hamsters.
R5kE1 TIL “Fiddler on the Roof” is a smash hit in Japan, with hundreds of revivals since 1967. A Japanese producer wondered whether American audiences understood the play, “because it’s so Japanese.”
b9N6Q TIL The sharpest usable knife blades are made from volcanic glass called obsidian. They are 10 times thinner than a razor blade but can’t be used for surgical instruments as they could shatter.
Y7vWA TIL Ibex can climb near-vertical surfaces with ease
l7JXA TIL that more men than women are colorblind, not because knowing colors is considered a feminine trait, but because it is a sex-linked gene. Colorblindness is a recessive trait on the X chromosome, so men only need one bad X to be colorblind, whereas women need two.