First Discovered:
Updated May 8, 2019 |
Infoplease Staff
Iguanodon
| Meaning of Name: | “iguana tooth” |
| Period: | Triassic Period (240 to 205 million years ago) |
| Size: | 9 - 10 meters long |
| Weight: | 4.5 - 5.5 metric tons |
| Location: | England, Belgium, Germany, Spain, South Dakota, Mongolia, Utah |
In 1822 an English woman, Mary Ann Mantell, found a large tooth that was determined to be from a large reptile unlike any previously identified. In 1842, paleontologist Sir Richard Owen named the creature dinosaur, which meant “terrible reptile” — terrible in the sense of awesome or formidable.
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