› added 4 years ago

55

TIL about World Hello Day, a Holiday created in the 70s to remind the world that conflicts should be resolved with communication. It is celebrated by verbally greeting 10 or more people.

Read more wikipedia.org

via reddit.com

1ave7 TIL that helium is the only substance that can't freeze. Instead, once it reaches a temperature below it's melting point, it turns into a superfluid with zero friction.
K7Pw TIL that, in April 2011, two competing algorithms on Amazon.com each kept altering the price that they were selling a book about flies for based on how much the other was charging. After ten days of price warring, the price of the book had climbed to $23.7 million.
loWd7 TIL: Arizona refused to recognize Martin Luther King Day until 1993. In 1986, the Governor declared it would be recognized as a holiday in 1987. The next Governor repealed the recognition before it went into effect, and Arizona voters voted against making it a holiday in 1990.
j6MRX TIL in the Ottoman tradition, the throne did not automatically pass to the eldest son. Rather, potential heirs were expected to fight it out. As soon as the sultan died, the princes were plunged into a race for the throne. Whichever brother won the throne would have the other brothers executed.
wABJ TIL Lyudmila Pavlichenko, a female Soviet sniper with 309 credited kills, toured the US in 1942 to gain support for a second front in Nazi-occupied Europe; the press was more interested in her appearance and if she wore make-up on the front lines.