Under the lander:

Wow! Looks like the landing rockets blew away the soil covering a rock ( ice? )layer!
Here is a super 3D of the "screw":

with links to the new RAC image of this area.
looks more and more like a piece of the rover. The next press conference will gove it a word or two -- especially if the media asks about it! I wonder how we could draw the media's attention to this object?
And here is the other lander leg area: