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METHANE
In 1996, an oceanographic team returned to the site with underwater cameras to probe the seafloor visually. To their surprise, pictures came back showing methane hydrate covering the seafloor like freshly fallen snow. Methane hydrate is a solid that forms when high pressure and low temperatures combine to squeeze water molecules into a crystalline cage around a methane molecule. Cores drilled into the sediments revealed radish-sized lumps of hydrates, which fizzled and evaporated when brought onboard.
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