Mamenchisaurus hochuanensis

Sauropods weren't just the largest dinosaurs. They were also the largest animals to ever live on land. The sauropod Mamenchisaurus (Mah-MEN-chi-SAWR-us) lived about 160 million years ago. Like other sauropods, it had a long, flexible, and surprisingly light neck. Although it wasn't the biggest sauropod, it had the longest neck for its body size of any other dinosaur. It could have reached lots of plants while standing in one place.

Image credits: main image, © Raúl Martin; Mark Norell: AMNH; Mark Norell: AMNH.