Using light and ultrasound imaging technology, researchers have discovered how some frogs found in South and Central America have the rare ability to turn on and off their nearly transparent appearance.

By Christina Larson, Associated Press

A tiny Nevada toad at the center of a legal battle over a geothermal power project has officially been declared an endangered species, after U.S. wildlife officials temporarily listed it on a rarely used emergency basis last spring.

By Scott Sonner, Associated Press

Hellbender salamanders are as old as the dinosaurs, but scientists know very little about these ancient amphibians. Scientists need to know how many live in the Midwest and Appalachian regions of the United States and how healthy the population is,…

By Rebecca Jacobson, Inside Energy