There are some animals on earth that can be traced back to the Mesozoic Era when dinosaurs walked the earth; these animals include monotremes such as the duckbill platypus, reptiles such as the crocodilians and sea creat... More »

There are five major types of living reptiles, including lizards, crocodilians, turtles, birds and tuataras. While many popular references list snakes as a distinct form, they are firmly nested within the lizard clade. A... More »

www.reference.com Science Biology Zoology

Of the many giant crocodiles and alligators that lived in prehistoric times, the largest may have been Sarcosuchus, a distant relative of the modern crocodile that lived 112 million years ago. While a complete skeleton d... More »

Dinosaurs are no longer alive. The final species of dinosaur was wiped out in the Cretaceous-Tertiary extinction event more than 65 million years ago. An asteroid the size of Texas crashed into Earth at that time and kil... More »

www.reference.com Pets & Animals Dinosaurs

Mammoths are not still alive; they have been extinct for approximately four millennia. Video that emerged in early 2012 purportedly showing a woolly mammoth crossing a river in Russia was quickly shown to be a hoax. More »

www.reference.com Pets & Animals Dinosaurs

There are many theories attempting to explain why dinosaurs were so large, including that size related to the massive amounts of vegetation available as food, that size was a method of self-defense and that size resulted... More »

Fun facts about dinosaurs for kids start with the name "dinosaur." This name means "terrible lizard" and comes from the Greek language. They walked the earth for 160 million years during the Mesozoic Era, the Age of Dino... More »

www.reference.com Pets & Animals Dinosaurs