Going inside won’t necessarily protect you from the sun’s harmful rays. Here’s how to protect your skin whether you’re at home or on the go.

UV radiation might be behind the planet’s biggest mass extinction Volcanic gases, carbon dioxide, and UV-B rays made for a noxious combination for Permian life.

Fortunately, our atmosphere blocks or absorbs some of the UV-A and UV-B rays and all the most harmful UV-C rays. The amount of UV radiation coming into an area is measured on the UV index.

UVB rays, meanwhile, cause unprotected skin to tan and eventually burn. Overexposure to either type of ultraviolet light can cause skin cancer.

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 ...

Ultraviolet B rays cause sunburns, and ultraviolet A rays penetrate more deeply and induce tans. Both types of UV rays can cause DNA mutations that raise the risk of cancer, Dr. Farris said.

Pollen that dates to the time of the Permian-Triassic mass extinction event, roughly 250 million years ago, produced "sunscreen" compounds that shielded against harmful UV-B radiation, the ...

“Nuclear wars would cause an unfathomable loss of life and genetic resources, but also a prolonged nuclear winter that would ...