The average sperm cell swims at 8 inches per hour.
76
Your thumb is about the same size as your nose.
124
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
Your body is creating and killing about 2.4 million red blood cells per second.
17
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92