An iceberg floats through the water in Ilulissat, Greenland, in July. Researchers are studying how climate change and melting glaciers will affect the rest of the world. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images

A rig drills a hydraulic fracturing well for natural gas outside Rifle, Colo., in March. Brennan Linsley/AP hide caption

itoggle caption Brennan Linsley/AP

The surface tower at a drill site, under construction during blistering Antarctic winds. Data from instruments, deployed through 450 meters of ice, is transmitted from the tower by satellite back to the Naval Postgraduate School. Image courtesy of Tim Stanton hide caption

itoggle caption Image courtesy of Tim Stanton

This artist's illustration shows the Voyager 1 space probe. The spacecraft was launched on Sept. 5, 1977, and as of August 2012, it is outside the bubble of hot gas, known as the "heliopause," that radiates from the sun. NASA/Landov hide caption

itoggle caption NASA/Landov

The Alps' largest glacier, Aletsch Glacier, extends more than 14 miles and covers more than 46 square miles. Wikimedia.org hide caption

itoggle caption Wikimedia.org

A little chilly for camping: Ice-penetrating radar revealed a mega-canyon below the Greenland ice sheet, extending for more than 460 miles. Courtesy of J. Bamber/University of Bristol hide caption

itoggle caption Courtesy of J. Bamber/University of Bristol

Rock islands dot the ocean in Palau, Micronesia. The waters of the tropical Pacific Ocean have been relatively cool for the last 15 years. Christopher Ward/Corbis hide caption

itoggle caption Christopher Ward/Corbis

Kevin Trenberth is a distinguished senior scientist at the National Center for Atmospheric Research. Rich Crowder/Corbis hide caption

itoggle caption Rich Crowder/Corbis

Judith Curry with her dogs, Rosie (left) and Bruno, in the mountains near Lake Tahoe. The climatologist focuses on the uncertainties of climate change far more than on the consensus of climate scientists. Richard Harris/NPR hide caption

itoggle caption Richard Harris/NPR

Lake Eyre in South Australia is normally a dry salt pan and rarely fills with water. But it did after massive rains two years ago, and is seen here on May 20, 2011. Theo Allofs/Corbis hide caption

itoggle caption Theo Allofs/Corbis