If you’ve ever read Edgar Allan Poe’s “The Tell-Tale Heart,” you may hear a heartbeat as something a little creepy. Although it’s funny to note that on many sound machines for babies, a heartbeat is offered as a way to help them remember one of the sounds they heard in the womb. While listening to the heart isn’t new in the world of medicine, one of the most common tools for doing so is only a little more than 200 years old. I’m your host, Emily Prokop, and this is The Story Behind The