Your thumb is about the same size as your nose.
124
If you are cold you are more likely to be hungry because you use energy to keep warm.
144
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Your body is creating and killing about 2.4 million red blood cells per second.
17
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59
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