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The Executioner is a fire-spewing chopper built for the Discovery Channel's Biker Build-Off. See photos and specifications for this fiery chopper.

The Sportster is a custom motorcycle with a 74-cubic-inch Harley-Davidson engine. See photos and specifications for this Klock Werks chopper.

These home construction pictures show you the stages of building a house. See the process of building a house in these home construction pictures.

Old Skool is a custom motorcycle with a Paughco frame and Shovelhead engine. See photos and specifications for this Harley-Davidson-powered chopper.

Greenhouses are undoubtedly an integral part of humanity's future. Check out these 5 innovative greenhouses to see the future of green gardening.

Who says science can't be fun? See 10 fun TV shows about science that entertain and educate.

Handling the stress of aging parents can be difficult. See our 5 tips for handling the stress of aging parents for advice.

I read labels on food packages and always see the number of calories listed. What are calories? How are they measured in food?

Stickam is a social networking site that lets you share broadcasts of yourself with your friends. See how Stickam works.

Printable integrated circuits could dramatically lower production costs and make prototypes much easier. See how they will work!

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