The outlook for the North Atlantic right whale was already grim -- they're on the endangered species list, after all. But things could be turning downright catastrophic for the whales after a winter calving season where no calves appear to have been born.
원문출처 : https://www.cnn.com/2018/03/27/us/right-whales-extinction-trnd/index.html
원문출처 : https://www.cnn.com/2018/03/27/us/right-whales-extinction-trnd/index.html