Mystery martian object is relic of (our) civilisation

Landing debris ?

Getting Curiosity down safely involved a few explosions to separate the rover from the skycrane and the skycrane from the parachute and to get rid of the heatshield. Must have left bits of shredded junk all over the place.

Proof that we need human astronauts. A human can see things at a glance that would take a robot and a room full of engineers days to figure out remotely.

Just think of what we are missing. Unlike in the 60's our civilization is probably incapable of putting real people on the moon again much less another planet. Too mired in paperwork and political correctness. Soon enough we will be back to using outhouses instead of indoor plumbing because even new sewage plants will be too hard to actually accompish. Not to mention doing it in the dark because its too hard to build a new power plant to generate electricity.