This scientist re-wires frogs to grow extra limbs. Could it work in humans? From: Popular Science - 12/26/2016 By: Adam Piore The body electrician For decades, genetics taught us a simple truth: Each cell in our body (and there are billions) contains the blueprint that tells us how to grow. That might not be the whole story. Michael Levin, an assistant professor at Harvard, and a few others now say that tiny bioelectric signals surging through and among our cells act as an instruction to kick-start gene expression. These signals point cells in the right direction as they start to grow into things like hearts, and influence the shape and function of the body. For two decades, Levin has set about proving it. Read the entire article at: http://www.popsci.com/body-electrician-whos-rewiring-bodies Links: How to grow an arm http://www.popsci.com/how-to-grow-an-arm Tissue Engineers Regenerate Afghanistan Veteran's Leg Muscle from Pig Bladder Cells http://www.popsci.com/science/article/2011-06/tissue-engineers-regenerate-muscle-cells-saving-afghanistan-veteran%E2%80%99s-leg