Collective organization is everywhere, both around us and within us. Our brains are composed of billions of interconnected cells communicating with chemical and electrical signals. We are integrated in our own collective human society. Elsewhere in the natural world hundreds of thousands of blind...

The heart’s electric currents have been known for one hundred years, but three-quarters of a century later, the ECG is still giving up its secrets. Buchman explains the basic ECG signal and its relationship with the function of the human heart. He then turns to complex systems science to discover...