There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
City dwellers have longer, thicker, denser nose hairs than country folks do.
48
You forget 90% of your dreams.
256
Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
973
The first man to swim the length of Great Britain grew a beard to stop jellyfish stinging his face.
16
In the presence of attractive women, men find running easier, take more risks, donate more money, consume more calories, and talk more.
28
You can only remember 4 things at a time.
31