Friday the 13th: The Science Behind the 'Unlucky' Day

Friday the 13th: A day when superstitions rule and every setback can be chocked up to bad luck. This inauspicious date pops up at least once a year, and when it does, quite a few questions pop up, as well. Why is Friday the 13th considered to be unlucky? And who decided the number 13 was worthy of people's fear? If you have questions about Friday the 13th, we have answers. From the history of this unlucky day to the math that explains how often the dreaded date occurs in a calendary year, here's everything you need to know about Friday the 13th.

Did you know that this year had three Friday the 13ths? Why So Many 'Unlucky' Days in 2015?

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