There's 100 trillion good bacteria living in your body.
17
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
If your DNA was stretched out it would reach to the moon 6,000 times.
256
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
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99