Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
Your body is creating and killing about 2.4 million red blood cells per second.
17
Your heart will pump about 212 million liters in its lifetime.
26
Your thumb is about the same size as your nose.
124
One human hair can support 3 ounces.
191
It takes about 20 seconds for a red blood cell to circle the whole body.
102