Since the early 1960s, scientists have known about the so-called "dead zone" in the Gulf of Oman, a patch of water practically devoid of all oxygen. As anyone who has ever owned an aquarium knows, even fish require oxygen, but as a surprising new survey shows, the Arabian Sea features an oxygen-starved aquarium over twice the size of Tasmania - and it's still growing.
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A recent expedition to the Gulf of Mexico has yielded the largest "dead zone" ever recorded in the area. Measuring 8,776 square miles, this massive patch of oxygen depleted water is wreaking havoc on the Gulf's marine life -- a consequence of unchecked agricultural runoff pouring down from the Mississippi River.