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What Causes Mutations? Piecing Together DNA's Puzzling Edits

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DNA mutation can be caused by a wide variety of factors. Learn about some of the many causes of DNA mutation in this article form HowStuffWorks.

10 Causes and Treatments for Cold Sores

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Cold sores are caused by a virus that those infected will carry with them for the rest of their lives. Learn about 10 causes and treatments for cold sores in this article.

Top 10 Sunscreens for Oily Skin

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Sunscreens for oily skin aren't greasy like other sunscreens. Visit HowStuffWorks to see the top 5 sunscreens for oily skin.

How do one-way mirrors work?

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One-way mirrors are commonly used in police interrogation rooms, but how do they work? Learn about one-way mirrors and how one-way mirrors work.

The Science of Shade: Unlocking Photochromic Lenses

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How can my glasses change from transparent, when I'm inside, to dark when I go outdoors?

This Rare Giraffe Is Losing More of Its Color Every Year

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The first case of vitiligo observed in a giraffe. Learn more about this color-fading vitiligo giraffe in this HowStuffWorks Now article.

Quick Tips: Can carrying an umbrella protect your skin?

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Ladies once carried parasols, or decorative umbrellas, to protect their skin from the sun. Do umbrellas still provide the skin protection they once did?

Are Cats Color Blind? The Answer Isn't Black and White

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Have you ever wondered: Are cats color blind? The answer isn’t black and white — but it is mostly gray. (See what we did there?)

How to Care for Your Eyes

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Considering how important your eyesight is, caring for your eyes should be a part of your daily routine. Learn more about taking care of your eyes.

Does tanning lotion work?

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Does tanning lotion work? Visit HowStuffWorks to learn if tanning lotion works.

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