Dinosaur Facts: Unearthing the Truth about Iguanodon

For many, the word “dinosaur” conjures images of the mighty Tyrannosaurus Rex or the elegant Brachiosaurus. But one dinosaur that deserves equal attention is the Iguanodon. This fascinating creature from the Mesozoic Era has a lot to teach us about our planet’s history.

What is an Iguanodon?

The name ‘Iguanodon’ was coined by English geologist Gideon Mantell in 1825. The term derives from the Greek words ‘iguanos,’ meaning iguana, and ‘odous,’ meaning tooth. This name was given due to the resemblance of its teeth to those of modern-day iguanas. However, unlike its reptilian namesake, the Iguanodon was a formidable beast, reaching lengths of up to 10 meters and weighing as much as 3.5 tonnes.

Iguanodon Size and Appearance

An adult Iguanodon stood tall with a height of approximately 5 meters. Its most distinctive feature was its thumb, which was a sharp spike. Initially mistaken for a horn by early paleontologists, this thumb spike could have been used for defense against predators or foraging for food. Speaking of food, the Iguanodon was a herbivore, feasting primarily on plant matter.

Where did the Iguanodon Live?

Fossils of this incredible dinosaur have been discovered across the globe, from Europe to North America, indicating that it had a wide habitat range. These fossils provide evidence that the Iguanodon lived during the Early Cretaceous period, around 125 million years ago.

Iguanodon Diet

As a herbivore, the Iguanodon had a diet consisting of plant matter. Its beak-like mouth and rows of grinding teeth suggest it could consume a variety of vegetation, including leaves, twigs, and fruits. Some scientists believe that the Iguanodon may also have used its thumb spike to dig up roots or strip bark from trees.

Iguanodon Fossils

The first Iguanodon fossil was discovered in Sussex, England, in 1822. Since then, numerous other specimens have been unearthed, providing valuable insights into this dinosaur’s anatomy and lifestyle. These fossils have been instrumental in shaping our understanding of dinosaurs and their evolution.

Iguanodon vs. Other Dinosaurs

The Iguanodon shared its era with various other dinosaur species. One notable contemporary was the Megalosaurus, a carnivorous dinosaur that likely posed a significant threat to the Iguanodon. However, the Iguanodon’s size and potential defensive capabilities would have made it a challenging prey.

Fun Facts about the Iguanodon

  • The Iguanodon was one of the first dinosaurs to be discovered and named.
  • It was initially believed to walk on two legs, but later discoveries indicated it was likely a quadruped that could rear up on its hind legs when necessary.
  • Despite its massive size, the Iguanodon is believed to have been a relatively fast mover, possibly reaching speeds of up to 14 mph.


From its unique thumb spike to its global presence, the Iguanodon is a dinosaur that fascinates paleontologists and dinosaur enthusiasts alike. As we continue to unearth more fossils and refine our understanding of these prehistoric creatures, who knows what other intriguing facts we’ll discover about the Iguanodon?

So the next time someone asks you “who invented the word dinosaur?” or “what does Iguanodon mean?”, not only can you answer confidently, but you can also share some additional facts about this fascinating creature from our planet’s distant past.

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