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Backyard Vortex Cannon Shoots Rings Of Fire

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How To Turn An AK-47 Into A Soup Ladle

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Plant Enzyme Can Convert Carbon Monoxide Into Propane, Paving the Way for Exhaust-Powered Cars

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A Propane-Powered Lawnmower Cuts Cleaner

Barbecue-grill gas creates a better mower
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Get Medieval: How to Build a Metal Forge

Make a propane-powered forge in your garage and get your hammer and anvil ready
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Blowing (Up) Hydrogen Bubbles

A dramatic demonstration -- with exclusive video! -- of why the same gas that heats your house can also make it explode