Yellowstone bison now breed as one interlinked population. Genetic studies show strong gene flow across all bison herds.

A wildebeest, a gorilla and a giraffe were among the life-size puppets to begin a 20,000-kilometer (12,400-mile) trek across ...

As herd animals, goats like having company. People, it turns out, also like goats. "Park visitors love seeing the goats at work; their presence brings a lot of joy and adds to the park experience!" ...