Climate News Network: Antarctica has been losing its ice cover at an average rate of 92 billion tons a year since at least 2003, according to new research. And while the scientists cant yet say for certain that human-made climate change is the main cause, they warn that the ice loss has the potential to have serious impacts on sea level rise. The southern continent is the Earths largest store of fresh water, but is also its least studied area, having had no known human visitors until the late 18th century. So while...