Lots More Information
- How Sweat Works
- Why do humans have body hair?
- Why is the hair on your arm short but the hair on your head long?
- How fast does hair grow?
- How Hair Replacement Works
- How Hair Coloring Works
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.
When bedtime comes far too early, a child may be tempted to read under their covers by flashlight. Parents say the habit will ruin your eyes -- but is this old admonition true or false?