You jest, but I seriously believe we are likely martians. Early panspermia from Mars settles a LOT of astrobiological questions about origin of life and LUCA complexity.
To be clear, Mars’ descent into inhospitality was totally natural and the result of a smaller planet with stripped atmosphere just outside the habitable zone as the Sun cooled. I doubt Martian life developed to be multicellular. But I bet when we go we’ll find fossils of algae colonies and cyanobacteria, and maybe even some living remnants underground.
To be clear, Mars’ descent into inhospitality was totally natural and the result of a smaller planet with stripped atmosphere just outside the habitable zone as the Sun cooled. I doubt Martian life developed to be multicellular. But I bet when we go we’ll find fossils of algae colonies and cyanobacteria, and maybe even some living remnants underground.