National Geographic Society

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Raining Fire

The guys use a device that measures how many pounds of force is required to separate the Hemispheres.

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Host Tim Shaw takes on more scientific experiments and challenges viewers to guess the outcome when he attempts to find the best improvised BBQ lighters, the smallest number of parts needed to create an electric motor and the most efficient way to cook a breakfast — using a car. Plus, he demonstrates the incredible power of empty space, the way to achieve perfect synchronicity and the effects of putting a party balloon in a microwave.