Dolphins are known for what appear to be big, contagious smiles. But do they actually, well, smile? The answer, according to a new study of dolphin play, is a resounding “maybe.” Dolphins use ...

But in this case, the humpback stayed at the surface with its mouth open for 10 seconds, likely the result of the animal feeling the “the odd sensation of the sea lion,” says anatomist Joy ...

Let's take a look at these five animals that practice this extraordinary ... After several weeks, fully formed tiny frogs emerge from the father's mouth, hopping away to start their independent ...