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5 of Earth's Highest Deserts

science.howstuffworks.com/environmental/earth/geology/high-deserts.htm

Not all deserts have sand and they're certainly not all hot. They're just extremely dry and have little vegetation. That means deserts are located all over the planet, including at super-high elevations.

There's a Rhino-shaped Cave in Washington State

science.howstuffworks.com/environmental/earth/geology/rhino-shaped-cave.htm

It's perhaps one of the strangest fossils ever discovered. We'll explain how it came to be 15 million years ago, and how hikers found it in the '30s.

How Many States Are in the U.S.A.?

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The U.S. comprises states, territories and commonwealths. So how many states are in the U.S.A.?

Anyone With the Most Basic Geographic Knowledge Should Get 19/26 on This Quiz

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Mountains, rivers, country borders ... How well do you know the globe? This quiz will test your knowledge of basic world geography — start scrolling and see if you can get your bearings!

5 Sustainable Hardwoods

home.howstuffworks.com/home-improvement/home-diy/flooring/5-sustainable-hardwoods.htm

Look almost anywhere, and you'll see things made from wood. Harvesting that much wood can have devastating effects on forests and environments. Fortunately, some of the hardwoods that are most popular can be sustained in your own backyard.

How Uranium Mining Works

science.howstuffworks.com/uranium-mining.htm

Thanks to our voracious appetite for energy, the element long linked with nuclear weapons is taking on a new role. Where does the hunt begin for uranium?

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