1. The average person produces enough saliva in their lifetime to fill up two swimming pools.
2. Your nose is not as sensitive as a dog's, but it can remember 50,000 different scents.
3. Your stomach acid is even strong enough to dissolve razor blades.
4. You sneeze at the speed of 100 miles per hour or more.
5. Your brain uses up about 20% of all your body's oxygen and calories.
6. Experts estimate that the human eye can distinguish 10 million different colors.
7. A higher IQ is correlated with more dreams
8. Your body makes 180 million red blood cells an hour.
9. Except for identical twins, every person on earth has a unique smell.
10. During pregnancy, if the mother suffers organ damage, the baby in the womb sends stem cells to repair the damaged organ.
11. We are visual creatures, as almost 90% of the information we receive about our environment comes from our eyes.
12. It takes 200 muscles to take one step.
13. Your skin is the largest organ in your body and in a male adult, if it were to be stretched out, it would cover roughly 20 sq ft.
14. A person can survive for 2 months without food.
15. In each one of your kidneys there are 1 million filters that clean around 1.3 liters of blood every minute and push out close to 1.5 liters of urine daily.
16. Your tongue isn’t the only place you have taste receptors, you also have them in your stomach, intestines, pancreas, lungs, anus, testicles and brain.
17. If you laid all of your blood vessels end to end they would stretch 60,000 miles, or around the world nearly two and a half times
18. You can survive without oxygen for 5-10 mins before your brain cells start to die.
19. Women blink twice as much as men
20. After eating too much, your hearing is less sharp
21. Your feet have roughly half-a-million sweat glands that can produce up to a pint of sweat daily.
22. By the time you go to bed at night you are about 1 cm shorter than when you woke up that morning. This is because the cartilage between your bones is compressed throughout the day.
23. Babies can only see black and white when they are born.
24. By age sixty you will have lost half your taste buds
25. Your cornea is the only part of your body without a blood supply. It gets its oxygen directly from the air
26. Your teeth start growing 6 months before you are born
27. Most babies are born with blue eyes. Exposure to ultraviolet light (the sun) and melanin are what eventually bring out their true color