Top 10 megaregions in the United States

The core of the U.S. economy is made up of roughly a dozen megaregions, some of which stretch into Canada and Mexico. They produce hundreds of billions -- and sometimes trillions -- of dollars in economic output. They harness human creativity on a massive scale, and they are the source of the lion's share of the world's scientific achievement and technological innovations. If you're thinking of relocating, or you're looking for greener tech pastures, you'll want to check out these 10 key U.S. megaregions.

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Note: This material is adapted from Who's Your City?: How the Creative Economy Is Making Where to Live the Most Important Decision of Your Life, by Richard Florida. It originally appeared on BNET.COM.