› added 6 years ago

357

TIL of Precordial catch syndrome, a condition where you get random harmless stabbing pains in the chest

Read more wikipedia.org

via reddit.com

xLB7 TIL that Native Americans use to manipulate young trees to offer direction to important battlefields, graves and other significant landmarks. After hundreds of years you can still find many of them today.
Y7m9r TIL of Goodhart's law which states "When a measure becomes a target, it ceases to be a good measure" due to people gaming the outcome.
lkl5 TIL that editors will often add fictitious words to dictionaries in order to “catch” others copying off them. Cartographers also do this.
8alnG TIL that in 1981 Ken Rex McElroy was murdered in broad daylight with 40 witnessess yet the murder was never solved
awMQ0 TIL that U.S. General Dwight Eisenhower had a speech prepared in the event that the 1944 D-Day invasion failed. In the speech he takes full responsibility for the failure of the operation.