People with light skin and eyes are more likely to have freckles because they have less melanin, a chemical in the skin that protects it from sun damage by reflecting and absorbing ultraviolet (UV) rays. Instead of tanning, they freckle. Some people’s freckles fade away almost completely in the winter, and then return in the summer, when the person is more likely to sunburn. Sunscreen can help protect everyone (freckled or not) from the Sun’s harmful rays.
- Why do people have different color skin?
- Which hair grows the fastest?
- How many hairs do I have on my head?
- What is pus?
- Why do scabs form?
- Who invented the earliest milking machines?
- What causes a bruise?
- Which is the body’s biggest organ?
- How much air does a person breathe in a lifetime?
- Are the lungs connected to my voice?
- How do people breathe in and out?
- Does the brain feel pain?
- How can you measure a heartbeat?
- How many parts are there to the brain?
- What does my brain do, besides think?
- Why is blood red?
- How does the combine harvester help farmers?
- What do plasma, red blood cells, and white blood cells have to do with blood?
- How much blood is inside my body?
- What is DNA?
