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How the Euro Works

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As of January 1, 2002, the euro is the official monetary unit of 12 nations. Find out all about the euro, who's using it and the widespread effects of having a single European currency.

How Electric Cars Work

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Sales of electric cars keep soaring and the technology just keeps getting better. So how do electric cars work and just how green are they?

How Grass Works

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Grass plays an important role in enhancing the look of your house. Find out how grass grows and how to make your lawn the best looking on the block.

They stick around long after death and compete with the likes of Dracula, Frankenstein's monster and the Wolfman as one of the great figures of classic horror movies. Are you brave enough to unravel the history of these real-life, tangible ghosts?

How Narwhals Work

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Narwhals, the unicorns of the sea, are unusual tusked whales who like icy ocean waters. See what else makes narwhals interesting whales indeed.

How Profiling Works

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As the stars of true-crime documentaries and TV series, criminal profilers have one of the best-known law enforcement jobs in the world. Learn the basics of profiling.

10 Most Expensive Presidential Perks

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The President's benefits are nothing to sneeze at. Read about the perks and benefits you get when you become U.S. President.

How the First Lady Works

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The first lady is an important, if not formal, office in the United States. Read about first ladies, their history and why first ladies face such scrutiny.