Dino teeth tell a traveling tale

Dental evidence from sauropods suggests the mighty beasts migrated for food

By Stephen Ornes, 16:15 PM November 16, 2011

Animals migrate to survive. Golden eagles head south for the winter, salmon swim upstream to lay eggs and locusts move on when it gets too crowded. Scientists now say that 150 million years ago, plant-eating dinosaurs called sauropods living in North America may have migrated, too. The new study suggests these enormous animals traveled at the change of the seasons, leaving dry riverbeds in search of well-watered areas thick with plants.

Henry Fricke, a geologist from Colorado College in C...

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