Ask Smithsonian: Why Do We Love Junk Food?

What is it about junk food that makes it so hard to resist? Find out how this empty-calorie food is designed to keep us wanting more in this one-minute video with Ask Smithsonian host, Eric Schulze (1:06)

Learn more about junk food here then head right over to our video on willpower.

Have a question in mind? It's your turn to Ask Smithsonian.