the Stress Management Center and Phobia Institute in Asheville, N.C. estimates that 17 to 21 million people in the United States alone are affected by a fear of Friday the 13th.
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Friday the 13th is said to be unlucky because it combines a historically unlucky day and unlucky number.
The No. 13 has long gotten the human race ri...
UPDATE: See a slideshow of 13 superstitions involving the No. 13.
Today is Friday the 13th and there are superstitions all around on what this day ...
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