The Greenland ice sheet is cracking at its seams and literally falling apart at a rate that is a testament to the brutal and accelerating impact of global climate change. In just five years, 930 million cubic meters of cracks have opened up in the Greenland ice sheet. A recent, large-scale study from the University of Florida shows how this vast frozen region—the world’s second-largest ice sheet—is breaking apart faster than expected. (Eric Ralls, more at earth.com)