• They have had their genes changed to contain a special characteristic, like resistance to certain insects.

    VOA: special.2010.11.09

  • In fact,this is the single most common distinguishing characteristic of an American prisoner -- illiteracy.

    VOA: special.2009.04.27

  • He says it may be an evolutionary characteristic developed to help us.

    VOA: special.2010.02.24

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