Triskaidekaphobia refers to the fear of the number 13. In Italy, the unlucky number is considered to be the number 17.

Source(s): The Independent, World Wide Words

It takes 66 days to form a habit. In 66 days, Martin Strel swam the Amazon.

Source(s): Wiley InterScience, Martin Strel

Déjà vu usually lasts 10 to 30 seconds. Usually déjà vu lasts 10 to 30 seconds.

Source(s): HowStuffWorks