When you take a step, you are using up to 200 muscles.
886
Yawns are more contagious among people with closer relationships.
163
Enamel is hardest substance in the human body.
61
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
The human brain has the capacity to store everything that you experience.
4k
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217