Both hotspots and mid-ocean ridges are volcanic, so Iceland is doubly so.

ECONOMIST: Volcanoes and air travel: Small eruption in Iceland | The

The yoga might be done on windswept mid-ocean rocks (really), and the spa soaking in a vitality pool in a lush mangrove jungle.

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Some recent studies have revealed a significant concentration of particles in near-surface waters in areas of mid-ocean accumulation (N Pacific and NW Atlantic gyres).

UNESCO: All Events | United Nations Educational, Scientific and Cultural Organization

For example, as the atmospheric carbon-dioxide level in Hawaii goes up, the pH at a mid-ocean mooring about 450km to the north-west goes down (see chart).

ECONOMIST: Ocean acidification

America's satellite-linked detectors, by contrast, can be placed in mid-ocean.

ECONOMIST: Deluged without warning | The

Analysing the sea in this way might prove useful, too, in rescuing people whose boats have broken down or in locating the wreckage of aircraft that have crashed in mid-ocean.

ECONOMIST: Lagrangian coherent structures

Also within the atoll-like reef system are picturesque islands that are mid-ocean pit stops for a variety of migrating seabirds, giving twitchers almost as much reason as divers to be excited about Apo Reef.

BBC: The undiscovered jewel of the Philippines

Among those believed by the U.S. government to be responsible for the embassy bombings was Fazul Abdullah Mohammed, a native of the Indian Ocean island nation of Comoros who had moved to Kenya in the mid-1990s and married a local woman.

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