A mud sample extracted from the depths of about 4,000 metres (13,123 ft) below the Pacific ocean surface where rare earth elements were found, is pictured at a laboratory of Yasuhiro Kato, an associate professor of earth science at the University of Tokyo, July 5, 2011. REUTERS/Yuriko Nakao/Files
BERGEN, Norway: From the safety of their research vessel, scientists are exploring one of Earth's last frontiers – the sea floor – to discover more about valuable minerals vital in the manufacture of smartphones.
The scientists, from the University of Bergen in Norway, are sending robots 2,500 metres (8,000 feet) down into the waters between Norway and Greenland, to try to understand the environments potentially rich with rare earth minerals.
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