Glass frogs are named for their translucent skin, which helps display their internal organs from underneath (you can even watch their hearts beat). Although there are more than 150 different glass ...

Glass frogs often start life with some tender care from a source scientists didn’t expect: frog moms. Maternal care wouldn’t be news among mammals or birds, but amphibian parenting intrigues ...

Now you see them, now you don't. Some frogs found in South and Central America have the rare ability to turn on and off their nearly transparent appearance, researchers report Thursday in the journal ...

If you find an old glass flower frog, should you buy it? Besides the price, turn it over: Does it have little knobs, bars or feet on the bottom? There should be three or five, depending on the frog’s ...

As tiny glass frogs fall asleep for the day, they take almost 90 percent of their red blood cells out of circulation. The colorful cells cram into hideaway pockets inside the frog liver, which ...