Fingernails grow nearly 4 times faster than toenails.
31
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
There's a new vaccine for alcoholism that gives drinkers an immediate and harsh hangover, even if they drink a small amount of booze.
14
20 minutes after smoking a cigarette, blood pressure drops to normal.
37
If you stop working out, it takes twice as long to lose strength than it took to gain it.
16
Human teeth are almost as hard as rocks!
47
Your heart beats over 100,000 times a day!
54
Enamel is hardest substance in the human body.
61