Scientists have discovered the world's first transparent frog, an incredible amphibian that allows you to see its internal organs through its skin. This astonishing find showcases nature’s ...

When glass frogs emerge during the rainy season, researchers at the Smithsonian Tropical Research Institute follow their migration out of the forest and along streams. These transparent leaf-lying ...

The calling animal turned out to be a new species. A team of researchers set out to study the hourglass tree frog, a “small, brightly colored species” found in Central and South America.