1. Is it true that cracking your knuckles causes arthritis?

2. Does lightning never strike the same place twice?

3. Can you see the Great Wall of China from space with the naked eye?

4. Does shaving hair make it grow back thicker?

5. Do bats always turn left when exiting a cave?

6. Do goldfish have a three-second memory?

7. Does sugar make children hyperactive?

8. Can humans only use 10% of their brains?

9. Does swallowing gum stay in your stomach for seven years?

10. Is gold a heavy metal that is magnetic?