Evolving humor

From Psychology Today: "In its earliest forms, humor likely evolved from panting and grunting during non-serious fighting or other play, or during social "down time" among our ancient primate ancestors. Although there was nobody there to document the events with their cell phone, we can extrapolate from similar sounds and behaviors observed among modern primates. Over time, these sounds likely evolved into more specialized vocal sounds that we might now recognize as early forms of laughter. Early hominids that could make those early laughter sounds, and those who had the mental capacity to distinguish between laughter and non-laughter sounds, likely benefitted from stronger bonds with other individuals within their group."