Two people can be the same age and live completely different versions of getting older. One forgets names, the other trains for marathons. Scientists at USC think they may have found part of the reason. They’ve discovered the brain’s own heartbeat, a pulse that could explain why some people’s brains stay sharper for longer. The […] The post Your Brain Has Its Own Heartbeat—and It Might Show How Fast You’re Aging appeared first on VICE .