Here’s an interesting replacement for wheelchairs: the GlideCycle!
Well, it’s more close to a bicycle, but the whole idea is very interesting.
It’s designed basically to reduce the user’s weight on the leg.
Source: Gizmodo
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Curiosity amused the cat.
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And it comes full circle. The early wooden bicycles were kind of like this. A frame with two wheels and a saddle that you pushed with your feet.