Some weird facts about the human body are that humans shed about 1.5 pounds of skin per year and adults have 144 fewer bones than infants. Some other facts are that the human nose can remember about 50,000 different smells and the small intestines are up to 23 feet long.
Other weird facts are that a human sneeze can reach speeds of over 100 miles per hour, the feet can produce more than a pint of sweat per day, the heart pumps 2,000 gallons of blood per day and there are about 60,000 miles of blood vessels in the human body. A human produces about 25,000 quarts of spit in a lifetime, and a human snore can be as loud as a pneumatic drill breaking up concrete.
The human body contains over 100 trillion cells, with 10 times as many bacterial cells as human cells. The human body is composed of about 50 percent water, and the human brain contains about 100 billion nerve cells.
Humans can travel nonstop on foot farther than just about any other animal. In 2003, a human won a 22-mile marathon against horse-mounted competitors. This is possible because humans lack fur and have high sweat capacity; therefore, they shed heat rapidly. Also, humans' ability to walk on two legs and their large Achilles tendons produce a more efficient gait.