The mountains of waste we produce are a growing problem. Surely we can do better than just burying all that stuff in a hole. Recycling is an obvious part of the solution, but it's tricky because waste usually arrives as unsorted piles. To recover the value, first we must sort it.

That's what David Hinwood aims to do with his robotic hand. For now, he's focussing on sorting textiles, which is more complicated than it looks at first sight.

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