1. Daniel Radcliffe, who played Harry Potter, was allergic to Harry Potter's glasses.
2. If your DNA was stretched out it would reach the moon about 6,000 times.
3. On average, women's heart beat faster than men.
4. Acorns are poisonous to humans. If eaten, it can cause damage to the kidneys.
5. The tradition of exchanging wedding rings goes back to ancient Egypt times.
6. The attachment of the human skin to muscle is what causes dimples.
7. One square inch of human skin contains about 625 sweat glands.
8. Your foot and your forearm are the same length.
9. Laughing lowers levels of stress and strengthens your immune system.
10. The human body creates about 2,500,000 new red blood cells every second.
11. On average you blink 25,000 times a day.
12. Wearing headphones for just an hour will increase the bacteria in your ear by 700 times.
13. An astronaut can get 2 inches taller returning from space due to the cartilage disks expanding in the spine in the absence of gravity.
14. Your smell in unique! Your body odor is unique to you unless you have an identical twin. Even babies recognize the individual scents of their mothers.
15. Phobophobia is the fear of having a phobia.
16. Arachibutyrophobia is the fear of having peanut butter stick to the roof of your mouth.
17. The Hangzhou bridge in China is the longest bridge in the world with the length of 36 km.
18. At the moment the highest bridge is the Millau Viaduct in Millau France standing at a height of 343 meters.
19. A crocodile cannot move it's tongue.
20. Grasshoppers have White blood.
21. Hippopotamuses are born under water.
22. Bats are the only mammals that can fly.
23. The bones of a pigeon weigh less than its feathers.
24. The skeleton of an African elephant accounts for about 15% of its body weight.
25. Humming birds can't walk.
26. Rabbits are Lagomorphs.
27. Only female mosquitoes bite.
28. When born a baby giraffe is 1.8 m (6ft) tall.
29. The acid found in a snakes stomach can digest bones and teeth but not hair or fur.
30. Bees can see uv (ultraviolet) light.