Matt Barnes

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Skin patch turns friction into electricity to power wearables

Until we find that perfect technology to power wearables with our own bodies, scientists all over the world are going to keep developing possible candidates. A team from the National University of Singapore, for instance, has developed a flexible, postage-sized device that can convert static …

New aluminum air battery could blow past lithium-ion, runs on water - ExtremeTech

By on January 28, 2015 at 1:07 pm<p>This site may earn affiliate commissions from the links on this page. Terms of use.<p>As battery technologies go, the …

Clean Energy

How (and When) to Prune Trees

I wanted to touch base about pruning trees at this time of year, because as soon as the holidays are over, many of you do exactly that. And if you …

How to Build Leonardo Da Vinci's Catapult

In his new book Defending Your Castle, William Gurstelle shows you how to build catapults, crossbows and all the other devices you need to keep the invading hordes at bay.<p>In his new book <i>Defending Your Castle</i>, William Gurstelle shows you how to build catapults, crossbows and all the other devices …

Woodworking