Fossil teeth from ancient North American coastlines suggest some dinosaurs supplemented land diets with seaweed and other marine food, revealing a coastal feeding link that existed more than 100 million years ago
The researchers examined fossils from ancient coastal environments associated with the Western Interior Seaway, a vast inland sea that divided North America during the Cretaceous. More than 100 million years ago, the boundary between land and sea may have been a little less distinct than it looks on a map. Along the ancient coastlines of…
