› added 2 years ago

99

TIL that Cleveland, Ohio used to be the 5th largest city in the U.S. by population in 1920. Now it's the 45th largest.

Read more cleveland.com

via reddit.com

ADAJB TIL New York City has entire fake buildings that act as vents for the underground subway
M7g4B Today I learned that trampoline safety nets were invented in 1997, but by 2006 80% of new trampolines sold had nets.
RGRa TIL A virus is not technically alive or dead, just a chemical chain of molecules
vNAr TIL that between 1970 and 2010 the world lost half of it’s wildlife while the human population has grown from 3 billion in 1970 to 7 billion in 2014
m1Jjp TIL hazardous chemical exposures were common experiences in United States of America in mid 1960s, and two years before OSHA (U.S.A) enactment of 1970, 14,000 workers died each year from work related hazards and another two million were disabled or harmed.