A Chilean observatory comes online. Two rovers explore the watery past of Mars

A new observatory in Chile, the Vera C. Rubin Observatory, is searching the skies for things like asteroids, dark matter and dark energy. What new things might it uncover about the cosmos? Plus, the rovers on Mars are exploring two craters that have evidence of past water. Could they also be home to ancient life? lead scientists closer to finding out if Mars had water flowing on its surface.