Human teeth are almost as hard as rocks!
47
The lense of the eye continues to grow throughout a person's life.
34
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
It has been shown that caffeine causes headaches when stopped suddenly and can cause morning headaches that are relieved by a dose of caffeine.
101
A person infected with the SARS virus, has a 95-98% chance of recovery.
23
The human sigh acts as a physiological reset button.
23
Pain occurs when sounds are above 130 db.
124
During menstruation, the sensitivity of a woman's middle finger is reduced.
47