After Russia’s invasion of Ukraine, Roscosmos was summarily cut out of the ExoMars project, taking with it the rocket that was to deliver the Rosalind Franklin rover to space.
One year ago NASA’s Perseverance rover plunged through the Martian atmosphere and safely landed in Jezero Crater, a 45-kilometre-wide gouge that scientists suspect once hosted a deep, long-lived lake. The rover’s ultimate target is near Jezero’s western edge: a large, fan-shaped pile of sediments that washed into the basin through a notch in the crater rim about 3.5 billion