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6 Famous Americans Who Renounced Their Citizenship
Facebook co-founder Eduardo Saverin isn't alone in kissing Uncle Sam good-bye.
Orbiting Trash Trawlers Planned to Snare Space Debris
Debt for Nature: U.S. Cancels IOUs to Save Brazilian Rainforests
The Daily Wild: Feline and Fabulous
Photo of the Day: Guns and Rebar
Your Fragile Planet: 'Angel Oak'