Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
Every year your body replaces 98% of your atoms.
119
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
When you take a step, you are using up to 200 muscles.
886
Yawns are more contagious among people with closer relationships.
163
The average person's skin weighs twice as much as their brain.
131
Your thumb is about the same size as your nose.
124