If you stop working out, it takes twice as long to lose strength than it took to gain it.
16
You have no sense of smell when you're sleeping!
72
Fingernails grow nearly 4 times faster than toenails.
31
Enamel is hardest substance in the human body.
61
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
Your skin is actually an organ.
88
Your ears secrete more earwax when you are afraid than when you aren't.
229
From the age of thirty, humans gradually begin to shrink in size.
1