Dead Zone Deconfusinator: Oil Not the Only Problem in Gulf of Mexico, NASA Study Shows

NASA's revealed a study detailing the location and extent of the world's oceanic dead zones--regions where oxygen depletion stifles life. It looks like they're growing.

First up: What is a dead zone (apart from a creepy movie starring the inimitable Christopher Walken)? It's a region of the ocean where significantly less oxygen than normal is dissolved in the water, which stifles the normal oxygen-eating marine life that's usually found in the area, often with a food-chain-like effect (lack...