The North Water Polynya, between Nunavut and Greenland, is one of the Arctic’s most biologically productive areas — and an important part of the food supply for nearby Inuit communities.
Climate change has allowed spotted seals to find new hunting grounds, but the marine mammals ultimately depend on sea ice to survive.
The pumice blob has the potential to deposit new, healthy coral around the badly damaged Great Barrier Reef, scientists say.
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