Japanese study finds whales are losing blubber

A new study released by Japanese scientists suggests that whales are losing their blubber: Measurements taken from more than 4,500 minke whales slaughtered since the late 1980s reveal the animals have lost significant amounts of blubber, and are getting thinner at a worrying speed. The team says its study offers the first evidence that global warming could be harming whales, because it restricts their food supplies. And they say the discovery could only have been made by killing the animals.