Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
Your thumb is about the same size as your nose.
124
The average sperm cell swims at 8 inches per hour.
76
One human hair can support 3 ounces.
191
Poor eyesight (myopia) is associated with higher IQ.
232
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13