{
  "id": 4725382,
  "title": "Q&A: What dinosaur teeth reveal about diet and evolution",
  "url": "https://urgent.news/2026/08/31/q-a-what-dinosaur-teeth-reveal-about-diet-and-evolution",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-31T22:00:09.000Z",
  "source": {
    "name": "Phys.org",
    "slug": "phys-org",
    "url": "https://phys.org/news/2026-08-qa-dinosaur-teeth-reveal-diet.html"
  },
  "original_language": "en",
  "account": "Dinosaur teeth provide crucial insights into understanding the diet and ecology of prehistoric creatures, which vanished around 66 million years ago. The shape, structure, and wear patterns of dinosaur teeth enable scientists to reconstruct how these animals obtained and processed their food. However, fossil teeth should not be interpreted in isolation; comparisons with living animals help identify similarities and differences that shed light on dinosaur diets and the evolutionary processes shaping feeding adaptations in various animal groups.\n\nWhen discussing dinosaur diets, Takafumi Kato, a professor specializing in mammalian evolutionary history at Okayama University of Science, uses Tyrannosaurus as an example. Its sharp teeth with serrations along the edges resemble steak knives designed to cut through thick pieces of meat, indicating that Tyrannosaurus likely ate meat. However, diet determination relies on more than just teeth analysis, as very few living mammals have similar serrated teeth. Some seals' teeth may appear similar but differ from dinosaur teeth.\n\nMany dinosaurs replaced their teeth repeatedly throughout their lives. For instance, Tyrannosaurus would lose an old tooth after use and wear, while a replacement tooth developed underneath it. Among plant-eating dinosaurs, living iguanas have small teeth with numerous fine serrations, perfect for cutting plant material. Fossil teeth resembling iguanas' teeth have also been discovered, with spatula-shaped teeth featuring serrated edges on both sides and a central raised portion. These teeth belonged to Iguanodon, a plant eater, as evidenced by their morphology and other evidence.\n\nDental structure and function differ significantly between carnivorous and plant-eating dinosaurs. Iguanodon teeth are broad and leaf-shaped, with ridges on their surfaces, enabling them to cut and crush plant material when upper and lower teeth came into contact, forming large wear surfaces. This structure, known as a dental battery, allowed them to continuously replace worn teeth and maintain an effective chewing surface.\n\nInterestingly, hadrosaurs, such as Parasaurolophus, and deer share remarkable similarities in their dental structure. Parasaurolophus' teeth were arranged across the chewing surface, with different hardness tissues forming an uneven surface well-suited for grinding plant material. Enamel patterns and tooth outlines in Parasaurolophus closely resemble the molars of modern deer and cattle, demonstrating an example of convergent evolution—a phenomenon where unrelated lineages evolve similar features to perform the same function efficiently.",
  "summary": "What did dinosaurs eat? Teeth provide important clues to understanding the ecology of dinosaurs, which became extinct approximately 66 million years ago. Their shape, structure and patterns of wear can help scientists reconstruct how these animals obtained and processed their food.",
  "key_points": [
    "Dinosaur teeth reveal diet and evolution insights",
    "Sharp, serrated T. rex teeth indicate meat-eating",
    "Iguanodon's spatula-shaped teeth show plant-eating"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}