Much to the surprise of the researchers, who assumed that attractiveness would be a learned concept, a study involving newborn babies (up to 3 days old) has found that right from the beginning, humans distinguish between attractive and un-attractive faces. The babies spent 60-65% of their time studying the attractive faces.

Supporting the view that there is a close connection between personal space and perceived danger, a doctor believes he has identified a clinical condition he calls Personal Space Phobia, in which individuals become frantic at the thought of anyone coming too close to them. He says it can occur in cases of severe PTSD (post-traumatic stress disorder), as a result of experiences in which they were convinced they would die.