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IRA FLATOW, HOST:

Welcome to SCIENCE FRIDAY. I'm Ira Flatow. Thinking about a tattoo? Well, forget butterflies, unicorns or mom. Tattoos have gone geek. No more of those blurry anchors and pinup girls. We've got molecules, double-helix strands, mathematical equations all showing up on biceps and other places.

Jim Brown, Dennis Rodman and O.J. Simpson are all former professional athletes who've tried their hand at acting. Showbiz might seem like a natural path for guys with big egos and million-watt personalities, but Eddie George is a former NFL player who's taken a different path to the limelight.

He's joining a fraternity of actors that includes Charlton Heston and Orson Welles in playing William Shakespeare's Julius Caesar.

In Texas today, conservative Christian and evangelical leaders begin two days of meetings to discuss political strategy, and perhaps to coalesce around a Republican presidential candidate other than front-runner Mitt Romney, the former governor of Massachusetts.

NPR's Barbara Bradley Hagerty reports on the search for a so-called "Jesus candidate" and the evolving influence of Christian right leaders in the Republican Party.