Photo from NASA Mars Orbiter shows wind's handiwork

Why even think of sending humans to a place without food,water or an enviorment suitable for human life? send a robot that can talk to us. The robot can build a station,then us humans can go.

I would have been happier to see some waves from an ocean. Lets face it we have so many deserts on our earth and very few people live there. On Mars it is very very cold and there is hardly an atmosphere. Too bad. Mars is too cold and has a thin atmosphere and Venus is too hot and have a very oppressive heavy atmosphere. No happy medium - well maybe there is; it is Earth.

Very strange & cool.Clear Skies.

Interesting hexagonal shaped wind driven interference ripples, stacked one on top of the other, in top right hand corner. They are not being destroyed by the wind. That means that a chemical cement work action is taking place right now. Possibly calcium sulphate(gypsum- plaster of paris) calcium carbonate or something else. Desiccation process at work? Dehydration possibility by wind action. Comments? Ideas?
Chris Landau (geologist)

A mysterious and beautiful image.
The larger hills seem themselves to have been sculpted by wind.
Let's hope that NASA can keep on paying for these extended missions.

The geophysical similarities between mars and earth do make these articles interesting

BEAUTIFUL !

So like, are the dunes still moving, or did it end millions of years ago? I must have missed that part. I'm guessing that they are still being moved around, only because I've seen pictures of the dust devils and wind cleaning the solar panels of the rovers. Without knowing that, and only knowing that Mars had a VERY thin atmosphere, a person might think that dunes couldn't possibly be moved by the thin atmosphere. Yes, most people know about the dust storms on Mars, but dust could be composed of microscopic dust, not 'dunes' discussed here.
Imagine trying to land on that sucker in a dust storm. Bring your rabbit's foot. Wouldn't it be something if we sent a mission all that way, and they couldn't land, because a dust storm started just as they arrived. That might be a very good reason to enter Martian orbit, rather than commit to a direct landing upon arrival. I doubt a spacecraft could make a successful landing during a dust storm. It might get sandblasted to bits on the way in. Or some instrument essential for a successful landing could get messed up on the way down by the dust. On a Moon landing, you can drop a few inches and possibly survive. (Unlikely, but I like to be optimistic.) In Martial gravity, you drop your ship and you're toast. Something is going to crack open.