This study from last year compiles a bunch of miscellaneous indirect evidence for simpler lifeforms on Mars: “Evidence is reviewed which supports the hypothesis that prokaryotes and eukaryotes may have colonized Mars.
Bluegreen algae & other microscopic critters in the ocean are so utterly vasty it’s like trying to visualize how many stars in a galaxy and how many galaxies in the universe.
Once upon a time, in an exotic land named “Neelu” . . . _read more