Fossil teeth indicate some dinosaurs were seaweed eaters over 100 million years ago

A study of fossilized teeth suggests certain dinosaurs consumed seaweed over 100 million years ago. This finding challenges the long-held assumption that all large plant-eating dinosaurs fed exclusively on land vegetation. The research, based on dental wear patterns, indicates these dinosaurs may have foraged in coastal environments. The discovery provides new insights into the diverse diets and ecological roles of dinosaurs during the Mesozoic era.