› added 1 month ago

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TIL cats' purring frequency (around 25-150 Hz) has been scientifically shown to be self-healing for them, including aiding in bone healing, and reducing stress.

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neY6Y TIL that gunpowder was discovered by the Chinese monks trying to make an elixir of life. Gunpowder: Origins in the East
GYpYj TIL that Albert Hoffman, the discoverer of LSD, dosed himself at exactly 4:20pm on Apr. 19, 1943, and then went on a bike ride.
OoN0Y TIL that "Big Ben" is not a clock, a tower, or even a building. It is the name of the large bell that is located inside Elizabeth tower.
yQaYv TIL that for 137 years, Barcelona's Sagrada Familia was being constructed illegally. It only got its building permit in 2019 when authorities found out it didn't have one in 2016.
5ZPp TIL a dumb hole is like a black hole, but sound waves rather than light waves are absorbed and cannot escape. A lab created one in 2009