Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
You can't tickle yourself.
29
Research has determined that most people are happiest at 7:26pm on a Saturday night.
70
Pain occurs when sounds are above 130 db.
123
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
