There was a caption on one of the photos: > perhaps fungi may have been transported to Mars already attached to the rover And another photo of a dark patch em

There was a caption on one of the photos: > perhaps fungi may have been transported to Mars already attached to the rover And another photo of a dark patch emerging from a seam on the rover. Seems to be to be pretty suggestive of Earth being the source. A crazy scenario would be if Mars becomes covered in mushroom-based life that evolves distinctly from life on Earth.