› added 7 years ago

100

TIL popcorn became popular during the Great Depression because it was fairly inexpensive.

Read more wikipedia.org

via reddit.com

97X TIL that crying releases excess stress hormones, thus creating the effect of feeling better after crying.
NXaxE TIL That aerodynamic 'ground effect' means that a fixed wing aircraft can lift off before it reaches its minimum climb speed, in effect 'floating'. For helicopters it means that they have to calculate two take off weights, In Ground Effect (IGE) and Out of Ground Effect (OGE) to ensure safety.
neoRB TIL, that few days after Chernobyl disaster, all children in Poland were given Lugol's iodine. This was one of the few cases, when Polish communist government, despite official denials of the Soviet side and against their recommendations, took action in the best interest of their own citizens.
W4Jd TIL that rats feel empathy to such a degree that they will ignore a lever that releases a tempting chocolate treat in favor of one that saves a drowning friend
W7dDX TIL Magic Kingdom in Florida is built on a network of tunnels that mirror the park so cast members can get to the different lands without spoiling the immersion.