publication date: Thursday, September 20, 2012 (part of Fall 2012)

category: Science

clue: Who better to tell Stephen Colbert and other TV hosts about the Curiosity rover than a man who has been to space five times?

explanation: Grunsfeld was an astronaut who made frequent media appearances concerned the Martian rover Curiosity. more…

do-over: This was a "do-over" goo, inspired by incorrect guesses for a previous goo.

solved by: Russ Wilhelm, Steve West, Justin Woods, Samir Mehta, LaVonne Lemler, Chris Lemler, Joanna Woods, Matthew Preston, Richard Slominsky, Denise Sawicki, Mike Rothstein, Steve Dunn, and Erik Bates

trivia: This goo was inspired by incorrect guesses for the goo of Orlando Figueroa.

Do Overs: These five celebrities were common incorrect guesses for recent goos. Here's your second chance to get each one right.

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