Photo gallery from Cold Warriors: Wolves and Buffalo.

Ecologist Chris Morgan shares photos from his time in Russia during the filming of Siberian Tiger Quest.

See images of Echo, her family, and the Amboseli team.

Illustrations by naturalist and writer Joe Hutto from his book Illuminations in the Flatwoods, the story that inspired My Life as a Turkey.

Photos taken in Chernobyl's exclusion zone during the filming of Radioactive Wolves.

Scientists continue to debate when, where, and why dogs evolved from wolves, but they are clear on one issue: the physical alterations that mark the transformation.

While the Balkan Peninsula serves as a refuge for many creatures, many of them are listed by the IUCN as vulnerable or endangered.

See a slideshow about working dog breeds.

Snapshots from northern Alaska, the last leg of the Bears of the Last Frontier journey.