Human body:  did you knows

  1. The human eye can detect more shades of green that any other colour
  2. You can’t tickle yourself
  3. The average person has over 1,460 dreams a year
  4. A baby fetus develops fingerprints at eighteen weeks
  5. A hippopotamus can run faster than a man
  6. The night vision of tigers is 6 times better than humans
  7. The average person consumes over a ton of food and drink each year
  8. There are over 100 different viruses that cause the common cold
  9. Humans are the only primates that don’t have pigment in the palms of their hands
  10. A person will die from total lack of sleep sooner than from starvation (Death can occur about 10 days without sleep while starvation takes a few weeks)
  11. The average human drinks over 60,566 litres (16,000 gallons) of water in a lifetime
  12. An individual blood cell takes about 60 seconds to make a complete circuit of the body
  13. By age 60 most people would have lost half of their taste buds
  14. Every square inch of the human body has an average of 32 million bacteria on it
  15. Fingernails grow faster than toenails
  16. Humans shed and regrow outer skin cells every 27 days (almost 1,000 new skins in a lifetime)
  17. It takes 17 muscles to smile and 43 to frown
  18. The human body has over 600 muscles (40% of the bodys weight)
  19. In 1900 the average life span in the US was 47

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