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When will life on Earth end?

science.howstuffworks.com/life/evolution/life-on-earth-end.htm

Imagine a time in Earth's far-flung past when organisms didn't swim through the oceans or populate the lands. Even the mighty dinosaurs hadn't arisen. Will the planet ever return to that lifeless state?

How Water Towers Work

people.howstuffworks.com/water.htm

You've probably noticed that there are power outages all the time -- but water outages? Much less common... How does the system work, and work so well? It's simpler than you may think. Find out how the design and location of water towers keep the water flowing.

Hidden Home Dangers Pictures

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Hidden home dangers pictures range from asbestos to air fresheners. Learn all about your toxic home with these hidden home danger pictures.

What are the pros and cons of hydrogen energy?

science.howstuffworks.com/environmental/green-science/pros-and-cons-of-hydrogen-energy.htm

What are the pros and cons of hydrogen energy? Learn about this innovative green technology and the pros and cons of hydrogen energy.

What Is Biodiesel?

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Biodiesel turns biodegradable fats and oils into an alternative fuel for your car. Learn about biodiesel components, biofuel history and biodiesel pros and cons.

Rhodium: Earth's Rarest and Most Expensive Precious Metal

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Discovered in the early 1800s from a chunk of smuggled platinum ore, rhodium is the most valuable precious metal on the planet today, used mainly for keeping car emissions in check.

How Radiation Works

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Radiation is a loaded word. Believe it or not, not all radiation is bad for your health. Learn which radiation is deadly and which isn't deadly.

How does the environment affect my skin?

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Want to know how the environment affects your skin? Visit HowStuffWorks to learn how the environment can affect your skin.

How Air-Conditioned Seats Work

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Have you ever been in a car with air-conditioned seats? Read about air-conditioned seats at HowStuffWorks.

How Solar Aircraft Work

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Solar aircraft could drastically cut down on fuel consumption. Visit HowStuffWorks to learn about solar aircraft.

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