- Shocking Spherules on Mars: NASA’s Perseverance Rover Finds a Rock That Defies Explanation SciTechDaily
- Check out some of the weird rocks that have turned up on Mars Science Current-News-Report
- NASA’s Perseverance Mars Rover Studies Trove of Rocks on Crater Rim NASA Jet Propulsion Laboratory (JPL) (.gov)
- ‘Are those blueberries or eggs?’: Mars yields new spherules with pinholes and fractures Business Today
- Mysterious Rock Discovered on Mars, Possibly Volcanic in Origin La Voce di New York
