Watch as NASA-JPL engineers test the Sample Caching System on the Perseverance Mars rover. Described as one of the most complex robotic systems ever built, the Sample and Caching System will collect core samples from the rocky surface of Mars, seal them in tubes and leave them for a future mission to retrieve and bring back to earth. The team is on track to launch Perseverance in July 2020 and land in Mars’ Jezero Crater in February 2021. For more information on the Mars 2020 Perseverance mission, please go to: https://mars.nasa.gov/mars2020/