Why do we cry? The three types of tears
[3:58]
Whether we cry during a sad movie, while chopping onions, or completely involuntarily, our eyes are constantly producing tears. Alex Gendler tracks a particularly watery day in the life of Iris (the iris) as she cycles through basal, reflex and emotional tears.
[Source: Ted-Ed YouTube link]Related Videos
Annaka Harris: Interview – Challenge Everything
March 28, 2020
Steven Pinker: The Philosophy of Free Will
March 28, 2020
The Biology of Addiction
August 05, 2019
Psychedelics: Mind-Enhancing Methods to Well-Being
June 22, 2019
The Royal Institution Lecture: What Makes Me, Me?
June 15, 2019