hmmm
Regarding the "bone picture", one can never say for sure at 30 million miles but there is something very interesting about the entire scene in that picture. As someone who has worked with and broken a wide variety of rocks and rock types, the shattered rock in the middle of the picture is just as interesting. Rocks don't shatter on their own. They may crack or even a piece can fall off from a crack, but shatter into small and large pieces? Highly improbable, like nearly impossible. It requires force to blow them apart like that and the edges look "clean" so it was relatively recent. Recent on Mars probably being different than "recent" on earth. Plus the straight line indentations in the dirt and the strange shading differences at what appears to be the edge of this area are all very puzzling. If one was walking in the desert on earth and saw this, it would be evidence of some human involvement, but that isn't possible on Mars now is it? As a rock hound, I have seen similar scenes many times because people come through rock areas with sledgehammers and large rock picks and walk along and hit rocks that might look interesting so they can see inside and determine if they are valuable. The smashed rocks end up looking like the shattered one in the picture - depending on their composition. Clean-face shards all around. Are we not the first to go there?