Nearly 50 years after its development, only a handful of creatures have passed the self-awareness exam. A new attempt with fish highlights a debate over the test’s use and meaning.

After release from rehab, bottlenose Billie started walking on water with her tail. Studying how the behavior spread could offer clues about how animals learn from each other.

The resulting lost protein, PON1, breaks down organophosphates in land mammals.

Dolphins and pilot whales can tell which orcas are coming for them by listening to their calls.  

The dolphins and their trainers will search for the endangered porpoises and enclose them in a protected pen.

Ancient bones of the newly described toothless, stout-nosed dolphin Inermorostrum xenops suggest that it slurped its food.

Capitalizing on dolphins' astute and playful nature, scientists devised an underwater interactive touchscreen game to help them study and interact with these creatures.

The University of St. Andrews behavioral ecologist studies the social structures and behaviors of whales and dolphins, recording and analyzing their acoustic communications.

Fossilized remains from a river dolphin relative provide some details about when the mammals left the oceans.