Re: If not evolution,
It is a better explanation, then imagining a invisible creature making it all happen. I will paraphrase what the leading astrophysicist on earth today, mentioned in a talk: Consider this…
When we look around our own solar system. We look at Mars- all the evidence suggest that mars was once a wet, fertile place. An oasis. There are dry river beds and flood plains and river deltas and meandering rivers and it’s all bone dried out. Something bad happened on Mars. Some knobs got turned in its environment that left it the way it is right now. Some bad knobs got turned on Venus, too.
So, it turns out that the moment that asteroids impact- when they hit- (they) can cast rocks in their surrounding areas into space with escape velocity. So they never come back to the planet from which it was launched. If Mars was wet and fertile before Earth was, as all evidence suggests, and if Mars had life before Earth had life, It is possible for there to have been bacterial stowaways in the nooks and crannies of the rocks that were cast into space.
This hardy bacteria that we already know exists on Earth. So by extreme temperatures, pressures, freeze dry- with constituted radiation- the hostile environment of space would be nothing to some of these bacteria. It may be that life on Earth was seeded by bacterial stowaways on rocks that were cast free from mars. This is a plausible scenario that is called panspermia- the transference of life from one planet to the next. If that’s the case, that makes all of us descendants of Martians.