Since other animals, such as non-human primates, horses, cats and dogs, also possess similar brain structures, it is possible that they too experience mystical moments, and may even have a sense of spiritual oneness, according to Nelson.
Marc Bekoff, a professor emeritus of ecology and evolutionary biology at the University of Colorado, Boulder, also believes animals have spiritual experiences, which he defines as experiences that are nonmaterial, intangible, introspective and comparable to what humans have.
Both he and primatologist Jane Goodall have observed chimpanzees dancing with total abandon at waterfalls that emerge after heavy rains. Some of the chimps even appear to dance themselves into a trance-like state, as some humans do during religious and cultural rituals.
Goodall wondered, "Is it not possible that these (chimpanzee) performances are stimulated by feelings akin to wonder and awe? After a waterfall display the performer may sit on a rock, his eyes following the falling water. What is it, this water?"