Teeth study shows big dinosaurs trekked for food

An undated photo released by Henry Fricke shows a sampling of dinosaur teeth from the Dinosaur National Monument in Utah. Scientists analyzing 32 teeth of plant-eating dinosaurs found that they migrated from the lowlands to highlands in search of food and water during the late Jurassic period. A new study suggests long-necked, plant-eating dinosaurs migrated hundreds of miles to find enough food for their gargantuan appetites. (AP Photo/ Henry Fricke, /Colorado College)

October 26, 2011 10:47:55 AM PDT
What did giant plant-munching dinosaurs do when they couldn't find enough to eat in the parched American West? They hit the road.