Biologists saw humpback whales that usually migrate from Antarctica to the equator to calve are now also continuing north beyond the equator, as far as Costa Rica -- a behavior never seen before. The increasingly long journeys, a result of climate change, are taking a toll on the animals' health, scientists say.
More than 300 whales have been found washed up in a remote inlet in Patagonia in southern Chile in one of the largest die-offs on record, researchers said Tuesday.