› added 1 year ago

365

TIL that while rare, your blood type can change.

Read more ourbloodinstitute.org

via reddit.com

GYGv1 TIL the reason rockets used to be painted with a large black and white checkered pattern was to make it obvious if the rocket rolled in flight.
epOLb TIL that Alcatraz, the famous high-security SF jail, was once a crucial military outpost in the Gold Rush years
8a7rL TIL the first Grand Wizard of the KKK later changed his mind and argued in defense of racial equality
jkRM TIL of Neal Loving; an African American who learned to fly in the segregated 40’s, founded his own flying school, designed at least 5 aircraft, flew one on an international tour, taught aviation mechanics and did it all after losing both legs in a glider accident.
rRMax TIL Norway formally annexed about one-fifth of Antarctica in 2015