Main question:
Why are people of all ages afraid of the dark?
Sub-questions:
°What's in the dark that make people so afraid?
°What creates the fear, is it myths or is it intuition?
°Is the fear of the dark psychological or biological?
Sources:
http://www.ted.com/conversations/6848/what_s_with_the_fear_of_darkne.html
http://phobias.about.com/od/phobiaslist/a/nyctophobia.htm
http://www.huffingtonpost.com/2012/08/29/fear-of-the-dark_n_1840014.html
Persistent fear and anxiety can affect young children's learning development by Harvard university