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The sky is the limit: human powered cranes and lifting devices. From the earliest civilisations right up to the start of the Industrial Revolution, humans used sheer muscle power, organisation skills and ingenious mechanics to lift weights that would be impossible to handle by most power cranes in operation today...

Treadwheel harbour crane built in the London docklands, 1850s, each walked by 3 to 4 men. Via Low-tech Magazine (http://www.lowtechmagazine.com/2010/03/history-of-human-powered-cranes.html).

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from The Huffington Post

Researchers Use Sound To Levitate Objects And It's Amazing

Last year we showed you this cool crane that folds into the bumper of your truck. This year we've spotted another neat power lifting device, this one completely mobile, which allows a single user to effortlessly hoist and transport up to 390 pounds. Developed by Australia's Makinex Construction Products, the

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