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How Does Herd Immunity Keep a Country Safe From Diseases?

science.howstuffworks.com/life/cellular-microscopic/herd-immunity.htm

Herd immunity relies on the principle of safety in numbers as far as vaccinations go. Find out why herd immunity is an important public health issue.

How Thanksgiving Works

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Today, many associate the holiday less with pilgrims and American Indians and more with football and turkey. What's the real story of Thanksgivig Day?

How Holograms Work

science.howstuffworks.com/hologram.htm

If you want to see a hologram, you don't have to look much farther than your wallet. But the most impressive holograms are large scale and illuminated with lasers or displayed in a darkened room with carefully directed lighting. Learn how a hologram, light and your brain work together make clear, 3-D images.

How Paramedics Work

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Paramedics are trained in prehospital care and are often involved in emergency situations. Learn more about how paramedics save lives every day.

How Pottery Works

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Pottery hasn't always been considered art, but it has always been used in a practical manner. Learn where pottery came from and where it's going today.

How Virgin Galactic Works

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Virgin Galactic is the first commercial space tourism company, offering flights to space. Read about Virgin Galactic.

Can You Match the Car Company to Their Logo?

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Perhaps when you were a kid, you played a game of naming the cars by quickly looking at their logo as they passed by your car window. The one's with their name on the logo were obviously easier to remember. It was an easy way to pass the time on long road trips and perhaps prepared you for this very quiz! Want to try and bring back childhood memories? Try and complete each question within a few seconds! A quick flash across the screen just like cars quickly driving by.

Which genetic factors affect skin?

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Which genetic factors affect skin? Visit HowStuffWorks to learn which genetic factors affect skin.

Does a corked bat really hit farther?

entertainment.howstuffworks.com/corked-bat-hit-ball-farther.htm

Does a corked bat really hit a ball farther? Find out whether a corked bat really can hit a ball farther in this article from HowStuffWorks.

How to Win the Privacy War With Facebook

computer.howstuffworks.com/internet/social-networking/networks/how-to-win-privacy-war-with-facebook.htm

HowStuffWorks talked to experts about the latest Facebook user data breach. How can you protect your information in the age of social media?

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