Spike in deaths
More than 30 grey whales have been found dead off the west coast of the USA this year, with others showing signs of malnutrition. Scientists say they may not be finding enough to eat in their polar feeding grounds.
More than 30 grey whales have been found dead off the west coast of the USA this year, with others showing signs of malnutrition. Scientists say they may not be finding enough to eat in their polar feeding grounds.