In the experiment, chimpanzees were given the chance to play a game that would reward them with food when they touched a target on a computer screen. This target was then made to appear behind an image on one side of a split screen opposite a blank side. Eventually two images appeared on the split screen, one being the face of a chimp. Reaction times were improved when the target appeared behind the chimp face, indicating that the test subjects' attention was already drawn to that image. Chimps' attention was even more focused on faces than on images of a banana.

Primate Research Institute's Masaki Tomonaga says it is well understood that humans process faces much differently than other visuals and their research has confirmed that chimpanzees also exhibit this predilection. This was also the case when human faces were displayed as part of the study.

So exchange glances with a chimp--the enjoyment will be mutual.