'Green Gardens' Sample in Tube
This image shows a cylinder of rock the size of a piece of classroom chalk inside the drill of NASA's Perseverance Mars rover. The sample, dubbed "Green Gardens," was taken from a rock called "Tablelands" on the rim of Mars' Jezero Crater. The image was captured by the Mastcam-Z instrument on Feb. 16, 2025, the 1,420th Martian day, or sol, of the mission.
Each core the rover takes is about 0.5 inches (13 millimeters) in diameter and 2.4 inches (60 millimeters) long.
Data from the rover's instruments indicates that Tablelands is made almost entirely of serpentine minerals, which form when large amounts of water react with iron- and magnesium-bearing minerals in igneous rocks. During this process, called serpentinization, the rock's original structure and mineralogy change, often causing it to expand and fracture. Byproducts of the process sometimes include hydrogen gas, which can lead to the generation of methane in the presence of carbon dioxide. On Earth, such rocks can support microbial communities.
Arizona State University leads the operations of the Mastcam-Z instrument, working in collaboration with Malin Space Science Systems in San Diego, on the design, fabrication, testing, and operation of the cameras, and in collaboration with the Niels Bohr Institute of the University of Copenhagen on the design, fabrication, and testing of the calibration targets.
A key objective for Perseverance's mission on Mars is astrobiology, including the search for signs of ancient microbial life. The rover will characterize the planet's geology and past climate, pave the way for human exploration of the Red Planet, and be the first mission to collect and cache Martian rock and regolith (broken rock and dust).
Subsequent NASA missions, in cooperation with ESA (European Space Agency), would send spacecraft to Mars to collect these sealed samples from the surface and return them to Earth for in-depth analysis.
The Mars 2020 Perseverance mission is part of NASA's Mars Exploration Program (MEP) portfolio and the agency's Moon to Mars exploration approach, which includes Artemis missions to the Moon that will help prepare for human exploration of the Red Planet.
NASA's Jet Propulsion Laboratory, which is managed for the agency by Caltech, built and manages operations of the Perseverance rover.
For more about Perseverance: mars.nasa.gov/mars2020/
For more about the Mars Sample Return campaign: mars.nasa.gov/msr