What in the world is causing all of these sinkholes in 2010? While there have always been sinkholes, 2010 has truly been a banner year for them. The colossal sinkhole in Guatemala made the most headlines, but the truth is that dozens of massive sinkholes have been appearing in China and giant sinkholes have even been opening up and swallowing cars in the United States. So is all this a sign that something significant is happening? Should we be preparing for the end of the world as we know it? ...