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Deinonychus

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Artistic reconstruction of Deinonychus, a small carnivorous dinosaur from the Cretaceous period.

Deinonychus

Deinonychus was a very special kind of dinosaur that lived a very, very long time ago—about 115 to 94 million years ago! It lived during the Cretaceous Period, in places that are now the U.S. states of Montana, Utah, Wyoming, and Oklahoma.

Deinonychus was not very big—it could grow up to about 3.4 meters (11 feet) long. But it had something very interesting on its back feet: big, curved claws! These claws might have helped it catch other animals, just like how some birds use their talons today.

A scientist named John Ostrom studied Deinonychus in the 1960s, and he changed how people thought about dinosaurs. Before his work, dinosaurs were often thought to be slow and heavy. But Ostrom showed that some dinosaurs, like Deinonychus, could be quick and very active!

Deinonychus is often found near another dinosaur called Tenontosaurus. Scientists wonder if they lived together or if Deinonychus might have eaten Tenontosaurus. We still have many questions about how these dinosaurs lived together.

People love learning about Deinonychus because it helps us understand how dinosaurs might have behaved. Some scientists think Deinonychus might have had feathers, just like birds today! This makes it one of the most fascinating dinosaurs ever discovered.

Images

Fossil cast of a Deinonychus dinosaur foot from the Cretaceous period, discovered in Montana.
A skeletal reconstruction of the dinosaur Deinonychus on display at the Harvard Museum of Natural History.
A fossil skeleton of Deinonychus on display at the American Museum of Natural History.
A diagram showing how big the dinosaur Deinonychus was compared to a person, with each square representing one square meter.
Size comparison chart of famous dromaeosaur dinosaurs, including Velociraptor and Deinonychus, shown alongside human figures for scale.
Artist's depiction of Austroraptor, an ancient predatory dinosaur.
An artist's reconstruction of the dinosaur Changyuraptor yangi, showcasing its feathers and predatory features.
An artist's reconstruction of the Bambiraptor dinosaur, showing what scientists believe this ancient creature may have looked like.
Illustration of Adasaurus, a small, feathered dinosaur from the Late Cretaceous period.
Scientific diagram showing the skeleton of Saurornitholestes langstoni, a small dromaeosaurid dinosaur from the Late Cretaceous period.
Scientific illustration of a Velociraptor, a fast-running dinosaur from the time of the dinosaurs.
An artist's reconstruction of the dinosaur Deinonychus, based on scientific research.

Related articles

This article is a child-friendly adaptation of the Wikipedia article on Deinonychus, available under CC BY-SA 4.0.

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