Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The average person's skin weighs twice as much as their brain.
131
One human hair can support 3 ounces.
191
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
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
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
The human brain doesn't stop developing until about 25 years old.
102