The international report card is out and confirms the hottest average on record — for a third time in 15 years. More than 400 scientists contributed data, finding a spike in sea and air temperatures.
Melting ice means more of the Arctic is accessible to exploration and shipping, and countries are racing to establish a presence. But they still need heavy icebreakers, and the U.S. is falling behind.
The U.S. Navy has completed the largest robotic survey of the Arctic ever attempted. Warming waters are absorbing more sunlight and melting more ice there each summer, the gizmos and gliders suggest.
Polar bears continue to take a hit in regions with the greatest loss of snow and ice, the latest report card on the Arctic shows. Meanwhile, plankton are thriving as the sea heats up.
The Icehotel in Sweden, built in winter and vanishing in spring, is the original hotel carved from snow and ice bricks. It's also an art project; sculptors compete for the chance to carve out rooms.
The region claimed is more than the size of Texas and Oklahoma combined. The energy-rich Arctic is also contested by Canada, Russia, Norway and the U.S. A U.N. panel will study the Danish claim.
As oil prices dip, controversial and relatively expensive production methods, like oil sands and fracking, have become less profitable. Some drillers are already cutting back on plans for more wells.