Diving into color reproduction -- what ultraviolet looks like, how to improve the color on your monitor without buying a new one, and the all-around awesomeness of the Mark I Eyeball.

The study examined 110 snake species from regions ranging from Colorado to Peru, many of which have visual systems that can perceive UV color in ways humans can't. Crowell and colleagues took ...

A UV reading under 2 is considered generally safe to be outside without any protection. Once we get into the moderate range (3 to 5), this is when sun protection is needed.

"The UV index represents the amount of skin-damaging UV radiation reaching the earth’s surface at any instant of time," the U.S. Environmental Protection Agency says in its UV Index Guide.

WHAT DO THE NUMBERS MEAN Believe it or not, forecasts play a big part in the numbers. The National Weather Service has an equation to determine the UV Index that factors in surface elevation ...

It was bathed in ultraviolet—literally “beyond violet” in Latin. Ultraviolet (or UV) light has wavelengths ranging from 10 to 400 nanometers. It is largely invisible to humans, but must be “apparent ...

The UV Index is a scale that helps illustrate how strong the sun's radiation is. (WDBJ Weather) The index uses a scale from 0 (low risk) to 11+ (very high risk). The forecast must consider cloud ...

3-5 UV value (moderate): A UV Index reading of 3 to 5 means moderate risk of harm from unprotected sun exposure. Take precautions, such as covering up, wearing a hat and sunglasses, if you will be ...