science and nature – nature online – science news

Playlist: www.youtube.com Find out more: www.bbc.co.uk 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.

Dora

Playlist: www.youtube.com Find out more: www.bbc.co.uk A mighty army of dolphins, sharks, whales, seals and gannets hunt down the billions of sardines along South Africa’s east coast each winter. This is the sardine run: an underwater Armageddon, the greatest gathering of predators anywhere on the planet, and the most spectacular event in the world’s oceans.

Brett