Underwater 'Rivers' Discovered on Ocean Floor

An underwater "river" has been discovered snaking along the ocean bed off southwestern Australia. The undersea phenomenon — layers of dense water that creep along the ocean floor at a rate of about a half-mile (1 km) a day — was found to be some 65 feet (20 meters) thick and stretches for more than 60 miles (100 kilometers). Researchers say it's the first time these rivers have been glimpsed in such warm waters.