"We are the people of earth!" The machines proclaim. "It is sad, but we are all that survives."
The aliens share a look of skepticism between them. They saw an awful lot that survived in the little time they got to spend on Earth, and speaking of earth they want to get back so try to rush through their interview with these weird machines.
The machines tell of a civilization, an environmental crisis. How they, the very best of Earth went to Mars so all would not be lost. 5/