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How and why do carcinogens cause cancer?

health.howstuffworks.com/diseases-conditions/cancer/facts/carcinogens-cause-cancer.htm

Why do carcinogens cause cancer? Take a look at studies on common carcinogens and learn how carcinogens cause cancer at Discovery Health.

5 Things to Know About Thin Skin

health.howstuffworks.com/skin-care/information/skin-types/5-things-to-know-about-thin-skin.htm

Bruise easily? You may have thin skin â€" a common problem associated with aging. Learn what causes thin skin and how to prevent it.

Alpha, Beta or Gamma? It's the Nuclear Radiation Quiz

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We live in a radioactive world, and we're not just talking about the times when a nuclear plant is melting down and scaring the heck out of us. How much do you know about the ABGs (or alphas, betas and gammas) of nuclear radiation?

Self-Cleaning Toilets: How Do They Work?

home.howstuffworks.com/home-improvement/household-hints-tips/cleaning-organizing/self-cleaning-toilets.htm

Self-cleaning public toilets are already a common sight in European cities, but exactly how do they work?

The Stratosphere Is Home to Earth's Ozone Layer

science.howstuffworks.com/environmental/earth/geophysics/stratosphere.htm

The stratosphere is one of Earth's five atmospheric layers that also includes the troposphere, mesosphere, thermosphere and exosphere.

How Swimming Pools Work

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Swimming pools provide a refreshing way to cool off on a hot summer day. Check out the different types of swimming pools and learn about the filtration process.

How the Sun Works

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The sun warms our planet every day, provides the light by which we see and is necessary for life on Earth. Learn about the sun.

How the Mars Rovers Work

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Of course we want to go to Mars. Until we figure it out though, roving robots with names like Spirit, Opportunity, Sojourner and Curiosity are our best bet for digging up dirt on our nearest planetary neighbor. Want to go along for the ride?

How Cloning Works

science.howstuffworks.com/life/genetic/cloning.htm

Cloning is the process of making a genetically identical organism through nonsexual means. In this article, we will examine how cloning works and look at possible uses of this technology.

Why does nail polish turn your nails yellow?

health.howstuffworks.com/skin-care/nail-care/health/nails-turn-yellow.htm

Why does nail polish turn your nails yellow? Find out how nail polish works and why it turns your nails yellow at HowStuffWorks.

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