An unlikely relationship

Beaver populations have a surprising impact on the wolves of Yellowstone.

06 February 2013

3 minutes

This clip is from

Nature's Microworlds—Yellowstone

Caledonian Forest—Scottish Highlands
Duration: 04:02
Thirsty work—Australia's Red Centre
Duration: 02:11
Twilight zone—The Deep Sea
Duration: 02:38
Keeping cool—Namib Desert
Duration: 02:14