Not a single North Atlantic right whale calf has been spotted by scientists this breeding season, raising concerns about the future of this endangered animal, NPR reports. Between November and March, the whales swim down to the warm waters of Georgia and Florida to give birth and raise their young, while researchers from the National Oceanic and Atmospheric Administration survey the population from airplanes above. But so far, the scientists have not seen any new calves. There are only about 450 North Atlantic right whales left, including 94 breeding females, and scientists are worried that they are dying at a faster rate than they are being born.
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