Discover the list of mammals that live only in water, such as whales, dolphins, manatees, and dugongs. Learn how these fully ...

The oceans are thought to be where life started but about 50-million years ago, something incredible happened: some mammals found their way back into the water. NOVA is available to stream on pbs.org ...

Learn more about the tentative ties between brain degeneration and beaching in dolphins, which could become more and more ...

In January 2009, a research team sailed from South America toward Antarctica. They hoped to document how killer whales, also known as orcas, worked together to create a wave that could knock a seal ...