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The two lungs-one heart system evolved because that was all we needed to survive. Learn more about the evolution of the two lungs-one heart system.

Carroll Shelby's 1967-1968 Shelby GT-350 and GT-500 combined speed and luxury into one sporty car. Read about the 1967-1968 Shelby GT-350 and GT-500.

Arnold Palmer transcended his sport and became a national folk hero. Learn how Arnold Palmer popularized golf in the United States.

Tiger Woods is one of the most accomplished golfers of all time. Learn more about Tiger Woods and his destiny to become one of the greatest golfers.

The FCC is in charge of regulating all radio and television broadcasts. Find out what the FCC does and how the FCC attempts to stop obscenity.

Basics of lung cancer gives an overview of this type of cancer. Learn more about the basics of lung cancer at Discovery Health.

Did humans invent war out of necessity, or was it invented purely to take advantage of someone else? Find out why we invented war in this article.

Love is in the air -- or at least on the screen. But do you know the difference between a meet-cute and a match made in heaven?

Did cooking shows create a generation of foodies? Visit HowStuffWorks to learn if cooking shows created a generation of foodies.

Want to know how to introduce a girlfriend to your friends? Visit Discovery Health to learn how to introduce a girlfriend to your friends.

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