Your heart will pump about 212 million liters in its lifetime.
26
Your thumb is about the same size as your nose.
124
The human body contains over a billion miles of DNA.
147
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
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17