NASA’s Perseverance Mars rover discovered a unique striped rock, nicknamed ‘Freya Castle,’ on the slopes of Jezero crater, sparking scientific interest. Initial measurements suggest it may be volcanic or metamorphic in origin. Despite its brief examination, Perseverance’s Mastcam-Z instrument provided significant clues about the rock’s composition. Scientists speculate it may have rolled down from a higher outcropping. The discovery aligns with mission expectations of finding unusual rocks, and further exploration may yield more detailed insights.