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
Your thumb is about the same size as your nose.
124
The right lung takes in more air than the left.
30
There are more bacteria in your mouth than there are people in the world.
60
The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
130
The human brain is more active during sleep than during the day.
28
Ernest Hemingway survived through anthrax, malaria, pneumonia, dysentery, skin cancer, hepatitis, anemia, diabetes, high blood pressure, two plane crashes, a ruptured kidney, a ruptured spleen, a ruptured liver, a crushed vertebra, a fractured skull, and more.
67
Your skin is actually an organ.
88