NASA has posted an update of sorts regarding the “shiny knob” seen in a recent Mastcam image taken by the Curiosity rover. This is the one previously referred to here as the “hammerhead” due to its shape.
The shiny-looking protrusion from a rock has been the subject of a lot of discussion. It looks like a piece of metal sticking out of the rock. So what is it?
According to the update, it may be a ventifact, where a portion of the rock, composed of a different and harder material, has been left standing after the softer rock around it has been eroded over time. The NASA article links to another PDF explaining this. Hopefully some closer images can be taken after the drilling tests are finished, as it’s not very far from the rover. Regardless of its origin even, it’s an interesting and peculiar little thing! Until then, the speculation will be sure to continue…
What do you think it is? Post your thoughts in the comments below.