› added 1 year ago

52

TIL that modesty was the reason stethoscope was invented by by René Laennec because he was not comfortable placing his ear directly onto a woman's chest in order to listen to her heart.

Read more wikipedia.org

via reddit.com

vP49D TIL that as early as 1802, Thomas Jefferson designed a cypher wheel to encrypt messages. It's unknown if he ever actually built or used one, but a similar tool was invented for the U.S. Army to use from 1920 until the start of WWII. Jefferson's designs were discovered shortly after.
4XQPb TIL: Spirit Rover got a significant extension to its mission on Mars when it's solar panels were scrubbed of dust by a passing dust devil in 2005.
GYVBQ TIL When pursued by a predator, a fleeing quokka mother will eject her baby from her pouch as a decoy to escape
mnNM TIL The largest consumer of kale before the 2013 craze was Pizza Hut.The thing is, Pizza Hut used it as decoration for their salad bars.They didn’t even feed it to people.
GYw5j TIL The world suffered an invasion of cloned crayfish. Marbled crayfish were first discovered in 1995. Since they can clone themselves, people who bought them as pets ended up dumping their unwanted extra crayfish into rivers. There are now clone colonies all over the world