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The Science of Shade: Unlocking Photochromic Lenses

science.howstuffworks.com/innovation/science-questions/question412.htm

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

Are solar car battery chargers effective?

science.howstuffworks.com/science-vs-myth/everyday-myths/are-solar-car-battery-chargers-effective.htm

Imagine waking up one morning to find yourself unable to get to work due to a dead car battery. You won't have to do that if you have a solar car battery charger -- but how well do they really work?

Plan a Historical Wedding and We'll Guess Your Relationship Status!

play.howstuffworks.com/quiz/plan-a-historical-wedding-and-well-guess-your-relationship-status

No matter what your relationship status is like, we're going to need your wedding planning skills for an epic day! Oh, and did we mention that we have a time machine that's about to transport you into the past for this?

The Oil Drilling Process Explained

science.howstuffworks.com/environmental/energy/oil-drilling-process.htm

Remember those orange juice commercials? The ones where people tried to poke a rolling orange with a straw?

Can You Insure a Car That Has a Salvage Title?

auto.howstuffworks.com/under-the-hood/salvage-used-junkyard-parts/insure-car-salvage-title.htm

Buying the right kind of insurance can be tricky with any car, but if you're dealing with one that has a salvage title, it can be even more difficult.

Meet the World's Longest Sea-Crossing Bridge

science.howstuffworks.com/engineering/structural/meet-worlds-longest-sea-crossing-bridge.htm

The Hong Kong-Zhuhai-Macao Bridge is 34 miles (55 kilometers) long and connects the territories of Hong Kong and Macao to mainland China for the first time.

Smart Wallpaper Contains Fire Alarm

science.howstuffworks.com/smart-wallpaper-contains-fire-alarm.htm

Researchers in China have developed a non-toxic "smart" wallpaper that won't burn and triggers an alarm when it gets hot.

Which East Coast City Are You?

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There are all sorts of cool cities on the East Coast, and each one of them has its own distinct personality. From Maine to Florida, which city are you?

How Sidewinder Missiles Work

science.howstuffworks.com/sidewinder.htm

A Sidewinder missile weaves through the air toward an enemy target as if it has a mind of its own -- and in a way, it does. High-tech "smart weapons" take most of the guess work out of hitting a target. Find out how Sidewinders seek and destroy.

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