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Welcome to the Scientific American Podcast Science Talk posted on August 7th, 2012.

I'm Steve Murski. As you no doubt know, the Curiosity rover has successfully landed on Mars. Ultimately, the plan is to drive curiosity from its

touchdown site in Gale Crater up the slope of a six-kilometer high mountain called Mount Sharp.

Along the way, scientists here on Earth

will be looking for geological signs of past water and even past life. The instrumentation

aboard curiosity that can do these investigations is called the Mars Science Laboratory.

Yesterday, August 6th, Scientific American contributor David Appel talked with Mars

Science Lab project leader John Groetzinger. He's also professor of geology at Caltech,

specializing in sedimentology, stratigraphy, geobiology, and ancient surface processes on Earth

and Mars. Here's David with Groatsinger.

Thanks, Vlad.

I'm sure you're part exhausted right now, huh?

Pretty wiped out, yeah.

How about just tell me first how you felt last night.

I was watching it on the web.

...