Nasa's Perseverance rover has reached a big moment in its mission to find evidence of life on Mars.
The robot will begin to climb up an ancient delta feature in the crater where it landed, stopping to examine rocks that could possibly retain evidence of life.
On its way back down, Perseverance will collect some of these rocks, placing the samples at the base of the delta to be retrieved by later missions.
The goal is to bring this material back to Earth in the 2030s for detailed inspection.
The BBC’s Science editor Rebecca Morelle reports.