Last Updated: Wednesday, June 16, 2010, 12:14
Southern Ocean sperm whales are an unexpected ally in the fight against global warming.
Last Updated: Wednesday, May 12, 2010, 09:41
The appearance of a grey whale off the coast of Israel has stunned scientists, in what was thought to be the first time the giant mammal has been seen outside the Pacific in several hundred years.
more videos >>
