Global Warming Has Now Made the Northwest Passage a Thing

More than a century ago, explorers dreamed of a Northwest Passage, a route from the Pacific Ocean to the Atlantic by plying the waterways north of Canada, threading through the Canadian Arctic Archipelago, huge icy islands north of Canada. Such a trip was fantastically dangerous and well-nigh impossible, since in the winter and even most of the summer, the waterways were either frozen solid or littered with huge blocks of ice. Roald Amundsen was the first to successfully make his way through. It...