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Stars' Strange Side Businesses

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Kevin Costner

He starred in "Waterworld," but who knew Kevin Costner had such a connection with the sea? In 1995, after purchasing a patent from the U.S. government, the actor began developing oil separation machines with a company called Ocean Therapy Solution. After the 2010 Deepwater Horizon oil spill, BP purchased several of Costner's machines in order to manage the disaster for a reported $52 million. —XFINITY Entertainment Staff (Photo by Getty Images)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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