Scientists 3D-print a 'brain' to learn the secret behind its folds

By 3D-printing a fake gel brain and watching it "grow," scientists at Harvard University have discovered how the human cortex develops its creepy, classic folds. The discovery, published in the journal Nature Physics, may solve a longstanding mystery about the structure of our gray matter and could even help shed light on certain disorders that may be linked to underfolding or overfolding of the brain.
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