Weather forecasts usually include a UV index, a measure of the intensity of ultraviolet radiation from the sun. The higher the number, the greater the risk to people. Most of the radiation that ...

You likely already know to protect exposed skin from the sun’s rays using sunscreen, but what about skin that’s not directly exposed? Are your clothes enough to prevent sunburn? Unfortunately, not all ...

Some people use the UV index to determine the best time to tan, believing that a higher index signals a better chance of tanning. However, this harmful trend misunderstands the UV index. The UV index ...