The kentrosaurus weighed between 1,500 and 3,500 pounds. ©YuRi Photolife/Shutterstock.com Like animals today, Jurassic creatures benefited from speed to evade predators or catch their prey. Animals ...

The kentrosaurus weighed between 1,500 and 3,500 pounds. ©YuRi Photolife/Shutterstock.com Like animals today, Jurassic creatures benefited from speed to evade predators or catch their prey.

The Jurassic Period lasted from about 201.3 to 145 million years ago. Evolution moved incredibly fast then, as did the creatures it created. In popular culture, we tend to think of dinosaurs as ...