It looks remarkably like a sinkhole. Although one could joke, "Hey guys we found your Mars Climate Explorer!"
Given the fact that its on the side of a volcano it could also be a hole in a lava tube. But whatever it is, it is really cool and damn wouldn't it be nice to have someone there we could ask to roll over and check it out?
Given the fact that its on the side of a volcano it could also be a hole in a lava tube. But whatever it is, it is really cool and damn wouldn't it be nice to have someone there we could ask to roll over and check it out?