Living in a sub-Arctic environment caused the sea cows to evolve to have large horny pads for eating kelp instead of teeth. Their bones grew denser to help with buoyancy, and they had a ...
As the planet heats up, the summer sea ice and all the superbly adapted life it supports—the bears, the seals, the walruses, the whales, the Arctic cod, the crustaceans, the ice algae—may well ...