When 15-year-old Alexis Hirth found out she was selected to help create a new Tucson mural, she nearly started crying. “I came home to balloons and cupcakes,” she says. Sarina Tusky, 18, didn’t think ...

In today’s society, chocolate is a popular treat, and comes in many forms, including blocks, paste and powder. Several centuries ago, however, chocolate was considered a luxury item, and came only in ...