Wild Rockies

Where the mountains cross international borders, herds of elk and moose live side by side with predators like bears and wolves.

The air is thin and cold, trees can't even live here -­ it's not exactly a welcoming place to live.

Some of mightiest rivers in North America originate on the glacial heights of the Rocky Mountains.

Survival in the forest means maintaining a delicate balance between growth and destruction and death and rebirth - a forest should be in a constant state of regeneration.

For a great many species, the structures of group living are the most important for survival.