According to recent research, the complexity of tooth surfaces reveals the diet of a species. Scientists at the University of Helsinki's Institute of Biotechnology and Department of Geology showed that the more complex the surface of an animal's teeth, the greater the share of vegetables in its diet.

Although some Americans gain five to seven pounds with a diet of big meals and sweets between Thanksgiving and New Year's Day, most people only gain a pound or two during the holidays, according to a UT Southwestern Medical Center registered dietitian.

Mindless eating leads us to eat 28-45 percent more calories when foods are 'low-fat'

Study shows low-protein, low-calorie dieters have reduced levels of hormone linked to cancer