Whales taking advantage of rising sea temperatures

Thousands of giant whales are taking advantage of melting ice caps off the coast of Greenland.

Rising temperatures mean that areas of the sea which were once frozen are now a feeding ground.

It's attracted hundreds of the world's biggest whales, including humpbacks, minke and fin whales.

BBC Science Correspondent Victoria Gill has this report.

Drone footage courtesy of Fernando Ugarte. Walrus photo by Mads Peter Heide-Jorgensen and Narwhal footage by Carsten Egevang.