Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Babies cry but they don't produce tears until one to three months after birth.
238
There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
A study had men report their own penis size, and the average was found to be 6.1-6.5 inches. A subsequent clinical study actually measured penises, and found the average size to be 5.1-5.7 inches.
-3
Men laugh longer, louder, and more often than women.
61
According to Harris Interactive, 70% of men and 57% of women shower daily.
75
Every human spent about half an hour as a single cell.
144