It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59
When you take a step, you are using up to 200 muscles.
886
Yawns are more contagious among people with closer relationships.
163