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TIL lemons are believed to be an ancient hybrid of three natural citrus fruits: the citron, pomelo, and mandarin orange.

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Aoll TIL The tires for the Bugatti Veyron cost $42,000 for a set. They last 15 minutes at top speed. The wheels have to be replaced every other tire change at $69,000 a set.
5YQkr TIL that Einstein's brain has been dissected and found to be no bigger than average but has significantly more astrocytes, which are poorly-understood neural connectors that anyone can increase by continuing to learn new things, and with a good diet, exercise, and love.
b60XZ TIL about the Bitch Wars: gulag prisoners who’d helped fight the Nazis in WW2 vs those who’d refused
XENx6 TIL that in the USSR, when foreign music was banned, bootleg records were made on old x-rays pulled from medical trash. These were called "ribs" and "bone records".
5VPkk TIL that VidAngel, a Utah-based media company that streams censored versions of popular films and TV series based on user-set criteria like nudity, profanity, and violence, was successfully sued by major Hollywood studies for copyright infringement.