TIL about the Pit of Despair, an apparatus used in widely-condemned experiments that isolated young monkeys in a dark, smooth tank with sloped sides and a curved base. The monkeys were left isolated and hopeless in the dark for months, supposedly to induce and study depression.

https://en.wikipedia.org/wiki/Pit_of_despair
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1g7ej74/til_about_the_pit_of_despair_an_apparatus_used_in/