The Americas' team made a landmark sperm whales discovery in producing the groundbreaking NBC nature documentary series.

A humpback whale stays by the side of a whale entangled in fishing gear. He spent more than five hours by her side, swimming below her and raising her to the surface to breathe. Photograph By Dan ...

Hope floats south of Nantucket, where an endangered North Atlantic right whale beloved by a group of Maine schoolkids was ...