Read More:
The History and Psychology of Clowns Being Scary
http://www.smithsonianmag.com/arts-culture/The-History-of-Scary-Clowns-217771511.html#ixzz2bJ9WsDWv
"You aren't alone in your fear of makeup-clad entertainers; people have been frightened by clowns for centuries."

Hospital clown images 'too scary'
http://news.bbc.co.uk/2/hi/health/7189401.stm
"Decorating children's wards with paintings of clowns to create a nurturing atmosphere could backfire, research suggests."

Fear Of Clowns: Yes, It's Real
http://www.npr.org/2013/08/06/209494071/fear-of-clowns-yes-its-real
"Warning: The following story may be upsetting to some people. That's because it's about clowns."

Watch More:
Fear of Missing Out:
http://testtube.com/dnews/dnews-291-scientists-measure-fear-of-missing-out
Fear Is Fun:
http://testtube.com/dnews/dnews-051-why-fear-is-fun
The Weight of Earth:
http://testtube.com/brainstuff/earth-weight