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Millions of tons of seaweed currently floating in the tropical Atlantic Ocean could soon make its way toward the U.S., according to researchers following the phenomenon.

A 'dead zone' off the Gulf coast is larger than NOAA predicted. The massive area poses danger to marine life, and recovery could take decades.

Warmer temperatures and increases in agricultural water runoff are sapping the Gulf of its oxygen supply, leaving it uninhabitable.

A 'dead zone' off the Gulf coast is larger than NOAA predicted. The massive area poses danger to marine life, and recovery could take decades.

A panel of experts gathered Thursday to discuss the dangers of the dead zone in the Gulf of Mexico and the harm it poses to humans and marine life.

The "dead zone" in the Gulf of Mexico has created more than 4 million acres of habitat with little to no oxygen that could kill marine life.

The "dead zone" in the Gulf of Mexico has created more than 4 million acres of habitat with little to no oxygen that could kill marine life.