One in 500 humans has one blue eye and one brown eye.
145
Men laugh longer, louder, and more often than women.
61
Females learn to talk earlier, use sentences earlier, and learn to read more quickly than males.
119
Girls have more tastebuds than boys.
124
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Children's sense of smell is better than adults'.
860