When you show images of a spider to a six month old baby their pupils expand, which is apparently a pretty reliable physiological indicator of fear. https://ww

When you show images of a spider to a six month old baby their pupils expand, which is apparently a pretty reliable physiological indicator of fear. https://www.cbs.mpg.de/Fear-of-spiders-and-snakes-is-deeply-embedded-in-us https://www.cbs.mpg.de/Fear-of-spiders-and-snakes-is-deeply-...