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(CNN) – Once upon a time (and this is a true story even though it begins “once upon a time”) there was a physician in India who had amazing ears.
His name was Krishan Chopra. He was a cardiologist with the Indian Army.
His ears were so sensitive that, through his stethoscope, he could hear and time the milliseconds between parts of a heartbeat that, today, doctors must use an EKG to measure.