On a flat map, Greenland looks like a lonely white expanse at the top of the world. On the right projections, it jumps out as the hinge between North America, Europe and the Arctic Ocean, a place ...

The Arctic is the "frontline" for climate change, scientists said. If there is any doubt about climate change, look no further than the coldest regions of the planet for proof that the planet is ...

A conveyor belt of ocean water that loops the planet and regulates global temperatures could be heading for a tipping point.

THE NORTHWEST PASSAGE—Climate change is melting sea ice at a quickening pace, and in the process rekindling dreams that have beguiled seafarers for centuries: finding an alternative shipping route to ...