What Would Life Be Without Fear?

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There are people out in the world whose amygdalae have degenerated to the point where they no longer feel fear but does that benefit them in any way?

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Previous Episode:

Why Do Some Of Us Love Being Scared?!: https://www.youtube.com/watch?v=3LGnYyl4fZ0&list=PLwwOk5fvpuuIKEPBxXknEnasdAZp3JHAQ&index=3

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Sources:

The No-Fear Woman (And What Her Brain Reveals):
http://news.discovery.com/human/psychology/fear-fearless-brain-emotion.htm

“In a new study, researchers exposed the unusual woman -- well known to science as SM -- to as many scary situations they could come up with."

Penis-Snatching Panics Resurface In Africa:
http://www.livescience.com/28015-penis-snatching-panics-koro.html

“In a recent issue of "Pacific Standard" magazine, Louisa Lombard, an anthropologist at the University of California at Berkeley, described visiting a small town in the Central African Republic where she encountered two men who claimed that their penises had been stolen."

What Is Collective Hysteria?:
http://science.howstuffworks.com/life/collective-hysteria1.htm

“Mass psychogenic disorder is a phenomenon that can be understood as resulting, in part, from the nocebo effect. Think of the nocebo effect as the opposite of the placebo effect."

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