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This is CBS. I'm the world. I'm John Bachelor from the surface of the planet earth. We're

on the surface of the planet Mars with curiosity, the rover with the drill. Bob Zimmerman is here

to introduce a challenge to curiosity, a very unusual drilling challenge. Bob, what is

happening? This is an update.

Yes. The rover has moved up onto a geological level. They call the Markovand. Markovand is

a flat smooth area that you can see on the flanks of Mountshop at the same elevation

on all sides. It's not there every spot, but it's there frequently on the flanks at the

same elevation. It's because it's flat and smooth. It suggests that it's been resistant

to erosion, the top of it roads away and then stuff under it roads away. It doesn't

erode. Of course, it's an interesting geological feature, so they've been very much interested

in studying it. So, I've got finally gotten there. A lot of the ways you study it is you drill

into it and get a sample and analyze the sample.

Well, before this week, they tried three different times to drill into a Markovand rock,

and what I'm able to do is so the drill just simply would not go down. They tried a

fourth time this week and once again, the drill just would not go in. The ground is the

rock is just too hard. Now, I've got a panorama behind the black showing where their future

...