The Mesozoic Era extinctions formed the world as we know it today. Read about what caused them and which animals survived.

All animals need water to survive. Land animals will get water by drinking it. Fish and other aquatic animals absorb it through their skin. Animals need shelter for protection. It protects them ...

One of the most important milestones in the evolution of life began some 400 million years ago, when the first animals made their way from water onto land. At that time, known as the Devonian ...