Researchers studying grey wolf populations in Yellowstone National Park have discovered an intriguing reason why some wolves may be more inclined to become pack leaders.

Gray wolf pups are born nearly helpless: blind, deaf and lacking the acute sense of smell of their elders. They usually remain in the safe confines of their den until they are at least three weeks ...

Reintroducing wolves to the Chihuahua region will restore ecological balance and help to regulate other wildlife populations.