More people have a phobia of frogs than rats.
41
Every hour one billion cells in the body must be replaced.
17
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
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Your skeleton keeps growing until you are about 35, then you start to shrink.
74
The average person can live for eleven days without water, assuming an average temperature of 60 degrees fahrenheit.
15
The average person's skin weighs twice as much as their brain.
131
Perspiration is odorless; it is the bacteria on the skin that creates an odor.
39