Scientists have discovered the world's first transparent frog, an incredible amphibian that allows you to see its internal ...

Glass frogs also have a unique circulatory system, with veins that are closer to the surface of the skin. This allows the oxygen-rich blood to be visible through the skin ...

These strange-looking creatures live in European waters. They are eels that are transparent when they are ... 40 times their own weight. The glass frog hails from the jungles of Latin America ...

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 ...