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What and where is the dark side of the moon?

science.howstuffworks.com/dark-side-of-moon.htm

Dark side of the moon is term that is used freely in pop culture. But what is the dark side of the moon? Learn more.

What are Saturn's rings made of?

science.howstuffworks.com/rings-of-saturn.htm

What are Saturn's rings made of. Learn about Saturn's six main rings, what Saturn's rings are made of and how Saturn's rings were named.

What are eco-plastics?

science.howstuffworks.com/environmental/green-tech/sustainable/eco-plastic.htm

Eco-plastics are plastics that are actually friendly to the environment. Learn about eco-plastics.

What are endorphins?

science.howstuffworks.com/life/inside-the-mind/emotions/endorphins.htm

What are endorphins? Learn about endorphins and happiness and HowStuffWorks.

What are microexpressions?

science.howstuffworks.com/life/microexpression.htm

Microexpressions, facial expressions that last a fraction of a second, are a form of nonverbal communication. Learn about microexpressions.

What are motion cards and how do they work?

science.howstuffworks.com/question607.htm

A friend of mine showed me this card that the image changed depending on the angle that you view it at. How does that work?

What are natural gas hydrates?

science.howstuffworks.com/environmental/energy/natural-gas-hydrates.htm

What are natural gas hydrates? Learn what natural gas hydrates are in this article.

What are the Nazca lines?

science.howstuffworks.com/science-vs-myth/unexplained-phenomena/nazca-lines.htm

Long before crop circles captured the world's imagination, a Peruvian culture called the Nazca went about creating a series of intricate lines -- sometimes in the shapes of animals -- on the desert floor. But how'd they do it -- and why?

What are the challenges of reducing solid waste?

science.howstuffworks.com/environmental/green-science/reducing-solid-waste.htm

Landfills have long been the final destination for garbage, but as they start to fill up, we're left to find ways to reduce our waste. What challenges are involved, and why isn't reducing waste as easy as it sounds?

What are the odds there is life in outer space?

science.howstuffworks.com/space/aliens-ufos/extraterrestrial-life-odds.htm

Are we alone? Jodie Foster's character in "Contact" didn't think so, and neither do the scientists who've been listening for an extraterrestrial message for decades.

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