Zebrafish have the remarkable and rare ability to regrow and repair their hearts after damage. New research from Caltech and UC Berkeley has identified the circuit of genes controlling this ability and offers clues about how a human heart might someday be repaired after damage, such as a heart attack or in cases of congenital heart defects.The research was a collaboration between the laboratories of Marianne Bronner, Caltech's Edward B. Lewis Professor of Biology and director of the Beckman Inst...