Vastitas Borealis, the area that Phoenix has landed in, gets covered in a metre-deep layer of frozen carbon dioxide.

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Vastitas Borealis, the area that Phoenix has landed in, will be covered in a metre-deep layer of frozen carbon dioxide.

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This is made possible by the fact that Blu-ray uses a 405nm laser to read its 0.1mm deep info layer, while HD DVD uses the same blue laser wavelength at the depth of 0.6mm.

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That seed is germinating deep beneath an obscuring layer of thick, black soil.

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Some 600, 000 years ago, it erupted and left an ash layer 10 feet deep as far as 1, 000 miles away.

FORBES: Fact and Comment

Some 600, 000 years ago, it erupted and left an ash layer 3 meters deep as far as 1, 600 kilometers away.

FORBES: Fact & Comment

It must be buried under a mountain, sunk to the bottom of the sea, or placed under a thick layer of salt deep under a desert for instance.

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Mr Illes said a layer of soil 2cm deep (0.8 inches) would need to be removed from the whole of the contaminated region.

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But the design requires that this silicon layer be no more than five nanometres (billionths of a metre) deep.

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In the deep water, large swaths of Wilcox sediment slumped over the side of the continental shelf and were swallowed by a layer of salt that dates back to when the American continents pulled away from Europe and Africa.

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