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TIL: The most common type of vertigo is caused by crystals (that sense gravity) becoming dislodged from a gelatin area inside the inner ear.

Read more vestibular.org

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5V9MB TIL that one species of jellyfish, Turritopsis dohrnii, is almost immortal. It can revert its life cycle by reprogramming its cells.
OoaM7 TIL Jimi Hendrix and his band accidentally dropped lump of hash in their dressing room's sink right before a BBC concert. They had to dismantle the drainpipe to save it. "I found a maintenance man and begged tools [..] We succeeded in our task and had a great smoke." remembers drummer Mitch Mitchell
Z8oeY TIL in 1976, 9-1-1 was serving only 17% of the population in the United States. By 1987, 50% of the US population had access to 9-1-1 emergency services. Today, 7% still do not have 9-1-1.
ep086 TIL that the new Rolls-Royce Ghost soundproofing was so overengineered that occupants in the car found the near-total silence disorienting, and some felt sick. Acoustic engineers had to go back and work on "harmonizing" various sounds in the car to add a continuous soft whisper.
ZpYx4 TIL of Judge Learned Hand, the most cited lower court judge in American history