If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
If you stop working out, it takes twice as long to lose strength than it took to gain it.
16
Your stomach produces a new layer of mucus every two weeks so that it doesn't digest itself.
160
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
Every year your body replaces 98% of your atoms.
119
The lense of the eye continues to grow throughout a person's life.
34
Each nostril of a human being register smell in a different way. Smells that are made from the right nostril are more pleasant than the left.
38