other extinct animals library

Some extinct animals are neither dinosaur nor mammal. Learn about trilobites and other extinct life in this section.

Featured Article: Is an ancient sea scorpion the largest bug ever to live on Earth?

The sea scorpion may have been the largest bug to ever live on the Earth, according to a recent find. Learn more about the giant sea scorpion. See more »

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Is an ancient sea scorpion the largest bug ever to live on Earth?

The sea scorpion may have been the largest bug to ever live on the Earth, according to a recent find. Learn more about the giant sea scorpion.

Aurochs

Aurochs, or Urus, an extinct ox that is believed to be the ancestor of domestic cattle.

Prehistoric animal

Prehistoric Animal, a popular term for any animal that lived in the remote past and is now extinct.

Imagine that you're a pterodactyl, walking on a warm, sandy beach in the area that is now Wyoming, 90 million years ago in the Cretaceous Period. Find out about these great extinct creatures that lived alongside dinosaurs.

Pterosaur

Pterosaur, any of more than 100 species of extinct flying reptiles. Each wing of a pterosaur consisted of a membrane of skin that extended from the side of the body to the tip of the elongated fourth digit of the forelimb.

Trilobite

Trilobite, an extinct marine invertebrate (animal without a backbone). Trilobites, which lived from about 600 million to 250 million years ago, are the earliest known arthropods (joint-legged animals, such as insects and lobsters).