Sir David Attenborough on the anti-whaling campaigns of the mid-late 20th century that pushed legislation dedicated to saving these incredible marine mammals from extinction.

Genetically-modified apple doesn't brown when bruised or cut, whales may have the ability to block out noise pollution, biodiversity researcher develops mathematical formula to count number of species on earth, and French cow's diet includes fine wine.

Although they're referred to as songs, male humpbacks create their famous underwater compositions by humming. The recital may contain half a dozen distinct themes that they've learned from one year to the next.

Analysis of Bowhead Whale Amino acid is revealing astonishing information about their age. There are some estimates that some could be over 200 years old, making them one of the oldest animals on the planet.

An infant sperm whale, separated from its mother, swims remarkably close to cameraman Doug Allan, and as he approaches it calls out with a series of loud coda clicks.

A group of male humpback whales compete for the affection of a female. After the mating marathon ends, the overlooked males engage in some surprising behavior.

All cetaceans, including whales, dolphins, and porpoises, are descendants of land-living mammals. But how did these terrestrial ancestors evolve over millions of years into the whales and dolphins we are so familiar with today?

A list of resources and websites related to whales, dolphins, and other marine mammals that were referenced in the PBS Nature Ocean Giants series.

Join PBS Nature, as it dives into the world of whales and dolphins, and reveals the secrets of their intimate lives like never before. Watch a preview of Ocean Giants.