المصدر -
SCIENTISTS have found giant craters on the sea bed around the coast of Norway, marking spots where huge bubbles of methane have apparently exploded.
The craters are up to half a mile wide and 150ft deep and appear to have been caused by gas leaking from deposits of oil and gas buried deeper in the sea floor. The gases are thought to accumulate in sea-floor sediments before bursting through the sea bed into the water above.
Details of the discovery will be released next month at the annual meeting of the European Geosciences Union, with a key question being whether such bubbles could threaten ships. One idea is that they may explain the disappearance of ships in areas such as the Bermuda Triangle.
