
This captivating series will take you to all corners of the earth to experience its different habitats, from shallow seas to the deepest, darkest caves.

Dive into the largely-unexplored seasonal forests of the world's temperate regions.

Planet Earth takes you on another breathtaking adventure to the bottom of the ocean. Learn about the landscapes and the wildlife that live below the surface.

Planet Earth explores the vast areas of desert that cover the planet. They are spreading every year, but how much more than that do we really know about them?

Learn all about the world's supplies of fresh water, a resource that is scarcer than you might think, despite how dependent we are on it.

Planet Earth explores the vast areas of desert that cover the planet. They are spreading every year, but how much more than that do we really know about them?

Let Planet Earth take you to great plains across the world, from Mongolia to Papua New Guinea, and learn about the landscapes and the herds of wildlife that inhabit them.

More than the bitter cold, the lack of access to fresh water makes life hard in frozen areas. Learn more about these regions of the world, from the tops of mountains to the North and South poles.

Learn all about the geology and volcanic forces that formed the earth's majestic mountain landscapes.

Witness the majestic views and incredible wildlife that exist between the two poles of the earth.

Learn about the richest parts of the world's seas: above the continental shelf is where the coral reefs and sometimes, the fishing grounds, lie.

Few people ever have the chance to see Ugandan mountain gorillas in person--they're among the rarest animals on earth, and they're critically endangered. But if you want to get a close-up look at the mountain gorillas, there's a new online program that's launching at the end of the month that could help you out.

But I don't even know what mountaintop removal mining is, you might say. Well, ignorance is not bliss here—mountaintop removal mining is a very real, very destructive practice. And even though the majority of Americans are against mountaintop removal mining, (even Ashley Judd hates it) it seems to keep finding ways to creep up again.

Scientists at the Desert Knowledge CRC say that Australia may hold some important keys to combating desertification, which is what happens when we take more resources from the land than it can handle and turns to desert.
::via sistersite TreeHugger.com
Photo credit: iStockphoto.com/John Carnemolla

Polar deserts on the Earth cover nearly 5 million square kilometers and are mostly bedrock or gravel plains. Sand dunes are not prominent features in these deserts, but snow dunes occur commonly in areas where precipitation is locally more abundant. Read more about polar deserts.

Polar bears are some of the most fascinating, inspiring creatures in the North American wilderness. And they're an endangered species. Here's where we come in. With the most minor effort, we can do our part to protect the bears—without getting up from our computers.


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