Two new studies have some questioning a link between so-called "food deserts" and obesity. "I think that the reason that these isolated studies got the attention they did is because they in fact were contrary to previous work, and in some ways that's interesting," said Gary Foster, director of the Center for Obesity Research and Education at Temple. "I think it would be premature to say based on these two new studies we are going to discard research from the previous two decades.”