00:00A cracker is imprisoned inside a steel chamber.
00:03Pure oxygen saturates the air, and the chamber descends into a water bath.
00:08An electric current ignites the food.
00:11It erupts into a violent bloom of flames inside the chamber.
00:14As it burns, its stored energy breaks free as heat, bleeding into the surrounding water.
00:21The more calories locked inside, the fiercer the heat, the hotter the water becomes.
00:26Then, a simple equation transforms that heat into the calorie number printed on your food label.
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