1 . The known universe is about 13.7 billion years old.
2 . The number of participants at the Last Supper.
3 . The 13th moon of Jupiter is Elara.
4 . 13 is the original number of colonies the USA was founded from.
6 . There are 13 stripes on the flag of the United States, six white and 7 red ones.
7 . A person who reaches the age of 13, is a teenager officially and remains there until 20.
8. Friday the 13th is considered unlucky in many countries.
9 . Fear of the number 13 is termed triskaidekaphobia. Try saying that fast 3 times.
10 . The number of cards in a single suit of standard deck of playing cards is 13.
11 . A Baker's Dozen is 13.
12 . Number 13 was the number Dan Marino, an American football player known for passing more yards than any other quarterback in NFL history wore.
13 . Number 13 is why we love doing this meme weekly.