If a person's DNA was stretched into a string, it would stretch from the sun to Pluto and back—17 times.
The heaviest human brain on record weighed just over 5 pounds––the weight of your typical bag of flour from the grocery store.
Children have 300 bones––adults, only 206.
During your lifetime, you will produce enough saliva to fill approximately two swimming pools.
Your nose can remember and recognize about fifty thousand different scents.
The average human body carries nearly ten times as many bacterial cells as human cells.
Been thinking a lot today? Believe it or not, the human brain is actually much more active at night than during the day.
A human blood cell can circulate through the entire body in about one minute.
The human body contains enough carbon to fill about 9,000 pencils.
There are nearly 74 km worth of nerves in the average human body.
Your brain has approximately 100 billion nerve cells, or neurons.
Microbiologists have estimated that a random handful of dirt can contain anywhere from 3 million to 50 billion microscopic organisms.
The smallest bone in the human body is located deep inside the ear. Known as the stirrup, it measures about the size of a grain of rice.