Mario Martinez, of Vanderbilt University, is investigatingthe causes of stigmata, the mysterious wounds resemblingthose Jesus received when crucified that sometimes appear onpeople’s bodies.

Usually it turns out to be self-mutilation, he says, but inrare cases, true stigmata occur. ”I wouldn’t try to reduceit to a black or white thing,” he says. ”My job is to rule(things) out. That’s really the job of the scientist.”
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