Yawns are more contagious among people with closer relationships.
163
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The human brain has the capacity to store everything that you experience.
4k
Every year your body replaces 98% of your atoms.
119
Chewing gum boosts your brain power.
285
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
The human body contains over a billion miles of DNA.
147