Desert topography seems especially alien. It is no surprise that some of the world's most unusual and spectacular flowers and trees are found in the desert.

For these animals, negotiating rocky terrain and finding food in such a scarce environment is second nature.

From cougars to crocodiles and alligators to hippopotamuses and rhinos, you would be surprised to see what exotic animals some people own as pets.

There are species of undomesticated animals that retain some or all of their wildness while performing tasks that benefit humans.

There are many unlikely animals that are able to endure or adapt to harsh environments. Here are some of the greatest of these survivor species.

Though the islands on this list are not as well known as the world's biggest and most scenic isles, they have plenty of characteristics that make them among the world's most unique islands.

These natural places feel like they belong far away from city life, yet they are surprisingly near some of the world's greatest cities.

There are many eco-friendly ways to approach pest control whether the problem is slugs on your patio or a snake in the pool, no need to rely on harsh chemicals.

Some of these species fall into the realm of strange animals, while others are extraordinarily colorful or seemingly out of place in a freshwater aquarium.

pet birds, farm animals, and even aquarium fish have been able to thrive in the wild in certain situations. Here are some examples of domestic species that have unexpectedly made a life for themselves outside the cage.

A look at 15 of the world's largest organisms, from whales to bears and elephants; even trees are included.

A look at some of nature's most intelligent, social, and organized animals - ones that might seem more human than human in some ways.

A look at the microsocieties of ants and termites, and how they react to one another.

Films like Madagascar tell exciting stories of animals escaping from their captors, yet the characters' real-life counterparts still sit behind bars -- except these lucky few.

Landfills don't have to remain steaming heaps of smelly rubbish. Take these ten former trash heaps that are now characterized by abundant green and diverse wildlife.