desdelaxarxa.net

Playlist: http://www.youtube.com/view_play_list?p=769661F6DEB6BA55
Find out more: http://www.bbc.co.uk/naturesgreatevents
Every year grizzly bear families in North America depend for their survival on a spectacular natural event: the return of hundreds of millions of salmon from the Pacific Ocean to the mountain streams where they were born. In a TV first, underwater cameras record the ingenuity and fancy footwork they use to collect dead salmon from the bottom of deep pools.

Duration : 0:1:18

(more…)

Playlist: http://www.youtube.com/view_play_list?p=769661F6DEB6BA55
Find out more: http://www.bbc.co.uk/naturesgreatevents
Every year grizzly bear families in North America depend for their survival on a spectacular natural event: the return of hundreds of millions of salmon from the Pacific Ocean to the mountain streams where they were born. In this clip, dozens of hungry bears eagerly await the salmon that make it up river.

Duration : 0:1:26

(more…)

Playlist: http://www.youtube.com/view_play_list?p=769661F6DEB6BA55
Find out more: http://www.bbc.co.uk/naturesgreatevents
In late summer the plankton bloom is at its height. Vast shoals of herring gather to feed on it, diving birds round the fish up into a bait ball and then a humpback whale roars in to scoop up the entire ball of herring in one huge mouthful.

Duration : 0:1:15

(more…)

Playlist: http://www.youtube.com/view_play_list?p=769661F6DEB6BA55
Find out more: http://www.bbc.co.uk/naturesgreatevents
The summer melt of Arctic ice opens up nearly three million square miles of ocean and land.

Duration : 0:3:24

(more…)