Language enables us to connect with each other and coordinate to achieve incredible feats. Our ability to communicate abstract concepts is often seen as a defining feature of our species, and one that separates us from the rest of life on Earth.
This is because while the ability to pair an arbitrary sound with a specific meaning is widespread in human language, it is rarely seen in other animal communication systems. Several recent studies have shown that birds, chimpanzees, dolphins, and elephants also do it. But how such a capacity emerges remains a mystery.
