› added 7 years ago

217

TIL that there is no blue pigmentation in blue eyes. The eyes appear blue as a result of Rayleigh scattering, the same process that makes the sky appear blue.

Read more wikipedia.org

via ift.tt

LkW5Z TIL Margaret Thatcher was reportedly more proud of being the first Prime Minister with a science degree than becoming the first woman.
PW5V TIL Horseshoe crabs have saved more human lives than all other animals put together
xKy5 TIL British spies stopped using semen as invisible ink because it began to smell if it wasn’t fresh
78wWb TIL the longest time served in prison by someone who was later exonerated was 48 years
nKVP TIL Boris Yeltsin’s faith in communism was shattered after a trip to a grocery store in a Houston suburb in 1989.