Nature World: Shark fossil teeth recently found in the Arctic Ocean suggest that the predators, despite the rising salinity of Arctic waters, could cope with climate change, according to a new study.
According to the International Union for Conservation of Nature, sharks are already in trouble, with 25 percent of shark species now threatened with extinction. Now with climate change adding to their plight, some worry that the decreasing salinity of their native waters - caused in part by melting ice on land...