Apatosaurus

Apatosaurus was a massive, long-necked herbivorous dinosaur that lived during the Late Jurassic period, about 152–151 million years ago. It belonged to the sauropod family, known for their enormous size and long tails. Apatosaurus could grow up to 75 feet (23 meters) long and weigh as much as 20–25 tons, making it one of the largest land animals to ever walk the Earth.

It had a small head compared to its body and likely fed on low-lying plants such as ferns and conifers. Apatosaurus fossils have been found in North America, particularly in Colorado, Wyoming, and Utah. For many years, it was confused with Brontosaurus, but scientists now recognize them as separate genera.