Originally posted by FabianFnas
Panspermia, or interplanetary transportation by meteors. How could we know which?
If panspermia is the correct theory, then more data would come in from life forms found on say, Titan, or Europa. If the meteorite theory is correct, then we will find life with maybe DNA similar to Earth life on Mars, and it would be another tale figuring out which came from where, meteorite hitting Mars with Earth life or vice versa.
If panspermia is the true story, then we would most probably find Earthy kind of DNA stuff on Titan, Europa, etc., and maybe other moons with internal heat and liquid water.
Of course we would not live long enough to see that news, I imagine that will have to wait till late 21st century or 22nd century, assuming our civilization lasts at a high technological level that long (global warming, wars, disease, whatever, stopping our civilization from being able to have a space program, an ice age, something like that and we are out in the cold so to speak, spacewise, too busy covering our assses on Earth to go back into space)