"Do you believe that people’s eyes emit an invisible beam of force?
According to a rather fun paper in PNAS, you probably do, on some level, believe that. The paper is called Implicit model of other people’s visual attention as an invisible, force-carrying beam projecting from the eyes ... This is a fun paper because the belief that vision involves a force or beam coming out from the eyes is actually a very old one. The theory is called “extramission” and it was popular among the ancient Greeks, but few people would admit to believing in eye-beams today – even if the concept is well known in recent fiction." (read more)