Experts are sounding the alarm over the hotter-than-average weather making its way across the US - warning that exposure to these temperatures could lead to life-threatening health complications.

Butterflies Navigate Using Map of UV Light, Study Finds By Karen Kaplan May 7, 2005 12 AM PT Times Staff Writer ...

Residents across some 16 states are facing high levels of ultraviolet (UV) radiation levels from the sun on Saturday, a forecast map from the Environmental Protection Agency (EPA) showed. An ...