Houston Is Called the Energy Capital of the World. It's Also Home to the Largest Medical Complex on Earth — 106,000 People on One Campus.
Houston is known for oil, but the Texas Medical Center on its doorstep is the largest medical complex in the world -- 54 institutions, 106,000 employees, one 2.1-square-mile campus. The city's real economy has always run on more than energy; the oil just gets the headline.
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