Big Picture: 'Bio-bauble' is next year's Christmas tree

This is the Bio Bauble, by inventor-in-residence Mark Champkins at London's Science Museum. Meant as a tree decoration, it contains everything needed to grow next year's tree, in a biodegradable plastic shell. “This idea came to me whilst I was admiring some transparent spheres in the Science Museum’s Challenge of Materials gallery," Mr Champkins said. "The plastic used for the bauble is a type which breaks down at a similar rate to which the seedling grows."

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