In 1973 a study was published in Science where psychologist David Rosenhan revealed he had duped hundreds of psychiatric workers by planting perfectly sane pseudopatients within their hospitals and every last one went unnoticed.

The Hindenburg Disaster
50:02

Short Stuff: Did Tippi Hedron start the Vietnamese manicure industry?
12:58

Humanists, the Happy Heathens
50:01