• The average person has 100,000 hairs on his/her head. Each hair grows about 5 inches (12.7 cm) every year.
  • There are 60,000 miles (97,000 km) in blood vessels in every human.
  • Healthy nails grow about 2 cm each year. Fingernails grow four times as fast as toenails.
  • Most people blink about 17,000 times a day.
  • Only humans sleep on their backs.
  • The human brain is 80% water.
  • Everyone's tongue print is different.
  • Our eyes are always the same size from birth, but our nose and ears never stop growing.
  • The average person falls asleep in seven minutes.