Even monkeys need a spa day Japan study finds

Researchers have long thought that being able to recognize faces is innate in humans and other primates, and that something in our brains just knows how to do this from birth. But a new brain imaging study suggests otherwise - macaques need to have been exposed to faces from a young age to be able to recognize faces. To better understand the basis for facial recognition, Harvard Medical School researchers raised two groups of macaques. The first one, the control group, had a typical upbringing, spending time in early infancy with their mothers and then with other juvenile macaques and human handlers. The other groups of macaques grew up raised by humans who bottle-fed them, played with and cuddles them - while the humans worse welding masks.