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Nature 415, 355 (24 January 2002) | doi:10.1038/415355b

Expedition trawls sea bed for energy-rich gas crystals

Quirin Schiermeier

An international team is this month scouring the floor of the Black Sea in an effort to gather more information on energy-rich methane hydrate crystals. Resembling ordinary ice, these structures are stuffed with natural gas and have been cited as a potentially massive source of energy.