A glacier more than 80 times the size of Manhattan is on the brink of splintering from Antarctica's Larsen C ice shelf and floating off into the ocean. Pictures released by NASA last November showed a 100-meter (328ft) wide and 500-meter deep (1640ft) crack slicing the incredible sub-zero temperature environment. According to Project Midas, a UK research group documenting the effects of global warming in the area, 10 percent of the overall Larsen C ice mass is now close to calving into the sea. It could mean the creation of a 5,000 sq km (193 sq mile) iceberg. In a statement, Project Midas revealed that the large iceberg is connected to the Larsen C mainland only along a 20km (12.5 mile) stretch. It added: "This [separation] will fundamentally change the landscape of the Antarctic Peninsula." The threat of massive glacial upheaval has not only put the future of the ice shelf at risk, but also brought danger to