Yawns are more contagious among people with closer relationships.
163
The human brain has the capacity to store everything that you experience.
4k
Chewing gum boosts your brain power.
285
The average person's skin weighs twice as much as their brain.
131
Enamel is hardest substance in the human body.
61
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
The average sperm cell swims at 8 inches per hour.
76
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55