The Science of Being Scared

Squeaks surprises Jessi, which makes her wonder: What's the science behind getting scared?

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SOURCES:

http://www.mentalhealthamerica.net/conditions/talking-kids-about-fear-and-violence
http://www.pbs.org/parents/expert-tips-advice/2016/03/becoming-brave-help-child-move-past-fear/
http://www.pbs.org/parents/daniel/fred-rogers-timeless-wisdom/children-fears/
https://science.howstuffworks.com/life/inside-the-mind/emotions/fear2.htm
https://www.britannica.com/science/fight-or-flight-response