Instant Index: Mars Rover Finds Red Planet Could Have Been Right for Life

Diane Sawyer reports the top stories that have people buzzing this week.
3:00 | 03/12/13

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Transcript for Instant Index: Mars Rover Finds Red Planet Could Have Been Right for Life
And our instant index begins on mars, a big discovery on the red planet. The curiosity rover has been collecting samples for months. Today nasa announced they have evidence there may have once been life on mars. Scientists studied rock samples from a three billion-year-old lake bed and say it was once full of water so pure humans could have drunk it. Just the right ph they say, not too salty. The martians life in question would be micros, not the scary green monsters we see in the movies. And right back here on earth, it took home the top five at the oscars, "argo," ben affleck, the story of an undercover cia team that smuggled americans out of iran during the hostage crisis. Two weeks after the oscars, iran held a private screening and today the verdict is in. They are not fans. Iran now threatening to sue the film make ertion, ben affleck and george clooney, they say the movie was unrealistic, an unrealistic portrayal of their country and they want an apology from the film makers and a concession of them that the movie is nothing but a lie. And there was a star is born moment today. Call it billy and the kid. The piano man himself billy joel taking questions from students at vanderbilt university when a freshman summoned the courage to ask his idol to help him realize a dream, to accompany him on piano for an edition of new york state of mind. And the response? Just watch for yourself. Okay. ♪ I'm in a new york state of mind ♪ afterwards, billy joel said that kid has some chops. Anou see something out there for the instant index, be sure to tweett I to us wherever you are in the world. Coming up from rome, the man

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