Some doctors, as well as many gourmet yogis, worry that the extreme and artificial heat in Bikram studios can lead to dehydration, over-stretching or worse.

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The heat from the reactions is transferred to the artificial muscles of the robot, and reshapes them.

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But then came July, when Mirant, Reliant Energy, Duke Energy, Dynegy and others took heat for their possible role in creating an artificial shortage during the 2001 electric power crisis.

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The Darpa-supported team instead moved their machine by using an "artificial muscle" made out of nickel and titanium wire designed to stretch and contract with heat.

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