It's a compelling idea but there is no evidence helping it.
For me, it's easier to take what we see in our own "lawn" and expand it outwards to the cosmos as a whole. A frog evolved from a single-cell as well as an elephant did, and the geological landscapes we see are the result of physics, time and random fluctuations. I apply that to every other galaxy and that's it.
Of course, one could think that single cell to be "planted" like a seed would be but no supporting evidence for now (or ever?).
It's a compelling idea but there is no evidence helping it.
For me, it's easier to take what we see in our own "lawn" and expand it outwards to the cosmos as a whole. A frog evolved from a single-cell as well as an elephant did, and the geological landscapes we see are the result of physics, time and random fluctuations. I apply that to every other galaxy and that's it.
Of course, one could think that single cell to be "planted" like a seed would be but no supporting evidence for now (or ever?).