TweenTribune: How Do People Get Phobias?

How can something like a tiny, harmless spider or a clown make your heart race and your palms sweat? And for the love of all things science, how can you make these fears stop? Find out in this one-minute video, where Ask Smithsonian host Eric Schulze delves deep into the dark recesses of our minds to get at the facts behind our phobias. (1:28)