Cycle of rising temperatures, thinning ice worries researchers
                                
                                
                                    (Newser) -
                                    The melting ice in the Arctic is part of a worrisome climate change loop, researchers say. Global temperatures are rising, which causes more Arctic ice to melt, which exposes more dark water to the sun, which raises global temperatures. In fact, the  Guardian  reports, sea ice in much of the...