When you take a step, you are using up to 200 muscles.
886
Your thumb is about the same size as your nose.
124
The average person's skin weighs twice as much as their brain.
131
The human body contains over a billion miles of DNA.
147
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
Yawns are more contagious among people with closer relationships.
163
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266