As temperatures rise or pressure rates fall, the hydrate disintegrates and the water releases the gas.

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Of course the all important rule is all on board is to hydrate well, something the crew discovered toward the end of the first leg of the journey, when water levels on board were so low not enough could be spared to keep the on-board hydroponic garden alive.

CNN: STORY HIGHLIGHTS

Methane hydrates are frozen water molecules that trap methane gas molecules in a crystalline, lattice-like structure known as a hydrate.

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