Iguanodon was a herbivorous dinosaur that roamed the Earth during the Early Cretaceous period, around 126 to 125 million years ago. It was one of the first dinosaurs to be discovered and named, back in 1825. Iguanodon was a large dinosaur, measuring up to 10 meters in length and standing about 4 meters tall. It had a long neck, a bulky body, and walked on both two legs and four legs, depending on its speed.

One of the distinct features of Iguanodon was the presence of thumb spikes. These spikes were believed to be used for defense against predators or for gathering food. Iguanodon had a toothless beak at the front of its mouth, which it used to crop plants. Behind the beak, it had rows of leaf-shaped teeth that were perfect for chewing vegetation.

Iguanodon likely lived in herds and had a social structure similar to modern-day herbivores. Fossil evidence suggests that Iguanodons traveled and foraged together, providing safety in numbers and facilitating efficient feeding.