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
We all know 20/20 vision is a good thing, but just what do those numbers mean?
Contact lenses have been correcting vision for more than a century, but lenses today can make you look like a cat, monitor your blood sugar and maybe even make you a better athlete.