Knock on wood, don't walk under a ladder, throw spilled salt over your left shoulder. All these superstitious things we do might actually help keep away bad juju. But don't take our word for it, it's backed by science! Guest host Annie Gaus explains.
via Discovery News http://news.discovery.com/human/videos/how-superstitions-work-video.htm#mkcpgn=rssnws1
via Discovery News http://news.discovery.com/human/videos/how-superstitions-work-video.htm#mkcpgn=rssnws1
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