Why Are Humans Scared of Spiders and Snakes?

A tiny spider moves on the bathroom wall and your heart jumps before you can even think. This hand-drawn Cave Notes story follows babies in a lab, monkeys watching a very strange movie, and our tiny ancestors in the trees to find out whether we are born scared of spiders and snakes, or learn it. WHAT YOU'LL LEARN IN THIS VIDEO What happened when scientists showed six-month-old babies pictures of spiders, snakes, flowers and fish, and why their pupils gave them away. The Snake Detection Theory, and the clues behind it: monkey brain cells that react fastest to snakes, and three-year-olds who spot snakes faster than flowers. How lab monkeys learned to fear snakes just by watching a video, but refused to learn to fear flowers. Whether spiders and snakes are actually dangerous today, why the fear sticks so hard to spiders, and the simple trick that helps the brain's alarm calm down. #psychology #brainandbody #evolution