Curiosity Blog, Sols 4879-4885: Struggle at Atacama

Written by William Farrand, Senior Research Scientist, Space Science Institute Earth planning date: Friday, May 1, 2026 Chile’s Atacama desert is the driest mid-latitude desert in the world, receiving only 15 millimeters (0.59 inches) of precipitation per year. Only the dry valleys of Antarctica receive less precipitation. These environmental conditions have made the Atacama a challenging place to survive in. Like its namesake, the Atacama drill target on Mars presented a challenge to the Curiosity rover and to the rover team. The planning week began with the downlinked data indicating that a successful drill hole was made in the Atacama target, but the rock being drilled into was a detached block and as the arm was raised to extract the drill, the rock came along with it ! Not being in the sample collection business, like her twin rover Perseverance, Curiosity’s rover planners went to work to develop a plan to extract the drill bit from the rock. These included efforts at changing the orientation of the drill bit, and attached block, as well as carrying out percussion to try to vibrate the rock off. Ultimately, as a result of activities like these in the Sol 4883-4885 plan, we freed the drill from the Atacama block. With in-situ science activities precluded due to the efforts to free the drill bit from the Atacama block, the science at that time instead focused on remote sensing. …