Scientists have spotted a rock on Mars that looks like Swiss cheese. NASA's Perseverance Mars rover snapped a hollowed-out boulder in Jezero Crater on June 26.
It follows the sighting of what the space agency described as a "doughnut-shaped" rock on June 22. Perseverance used its Mastcam-Z instrument to photograph the latest unusual discovery. Its mission is to help prepare for human exploration of the Red Planet.
NASA explain: "Wind can erode all sorts of strange shapes by sandblasting rock surfaces over the course of eons."
