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TIL The vibrations and contractions of a cat's purr show a consistent pattern and frequency around 25 Hz; these frequencies have been shown to improve bone density and promote healing in animal models and humans.

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5yMB TIL Frank Zappa’s Grammy-winning album Jazz from Hell received a “Parental Advisory” sticker even though it is a collection of instrumental pieces and contains no lyrics at all.
B40x TIL In 2003, a Boeing 727 was stolen from Angola. Neither the plane nor the pilots have been seen since.
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D1pp TIL the largest tropical cyclone ever recorded, if plopped on a map, would span the entire width of the contiguous United States.
XEa9P TIL Toyota logo in 1936 is “TEQ”