At night, your eyes adjust to darkness after several minutes. Do you know why it takes that long? Take a look at how your eyes adjust to darkness.
WHAT'S INSIDE: HUMAN BODY
- Body Parts
- Body Systems
If you've ever laced your fingers together, turned your palms away from you, bent your fingers back and heard a loud crack or pop, you know what knuckle-popping sounds like. So, what would happen if you popped your knuckles all the time?
We're taught that it's impolite to pass gas in front of others, but could holding it in cause you health problems?