The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The human brain doesn't stop developing until about 25 years old.
102
There are about 1,400 different species of bacteria in your belly button.
10
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
In one day, adult lungs move about 10,000 litres of air.
11
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
There's 100 trillion good bacteria living in your body.
17
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127