There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
Up to the age of six or seven months a child can breathe and swallow at the same time. An adult cannot do this.
165
Only 10-20% of the population can wiggle their ears and raise one eyebrow.
22
Most of the world's people must walk at least 3 hours to fetch water!
38
Humans blink over 10,000,000 times a year!
97
95% of people feel uncomfortable when the TV volume is an odd number.
392
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69