Actually I'm hoping for some little green men to come popping out of a hole in the ground to investigate the new addition to their lawn.

Actually I'm hoping for some evidence of life, mostly microbial. It shouldn't be too hard to find some complex organic material if they are looking for it. We have bacteria here on Earth that survive in extreme conditions. Why not Mars?

But, yes, a herd of caribou would be nice. And funny.

If you don't care for reality, just wait a while; another will be along shortly. --A Rose