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About a third of a millimeter in diameter, this mini-brain offers a 3-D alternative to cells growing in a Petri dish. It’s cheap, costing about 25 cents to make, and relatively easy to grow. The mini-brain lasts about a month and it could be used to study a range of challenges in neuroscience including transplanting nerve cells that could help treat Parkinson’s disease and studies on how adult nerve stem cells develop.
Image credit: Hoffman-Kim Lab, Brown University
