More proof, if we needed it, Mother Earth faces a wet and iffy future unless we act. A new study finds rising sea levels and storm tides could inflict catastrophic flooding on New York every few years - or 20 times more frequently than 170 years ago - and a startling new map shows the shrinking world that would result from rising sea levels caused by melting polar ice caps. Using elaborate traditional cartography based on NASA data, Slovakian graphic designer Martin Vargic has drawn the first-ever map detailing the devastation caused by what climate experts say could be a 260-foot rise in sea level. Hint: At least 75% of the world's population lives less than 300 feet above sea level, including the vast majority of all large metropolitan areas. Thanks to Google Earth and other marvels of technology, a couple of other sites allow you to see how far underwater your town or state would be. Scary, and hopefully galvanizing.