Jack in the Box. In-N-Out and more all use the color red heavily in ... And if swearing off fast food wasn’t hard enough, those colorful red logos might make it even harder to ignore.

There are tons of fast food logos that use the color red. But did you know that there's actually a scientific reason why this ...

McDonald's. Arby's. Wendy's. Burger King. Jack in the Box. In-N-Out and more all use the color red heavily in their logos, why? The answer goes back thousands of years. Following is a transcript ...