Theory: Seeding

I've heard a theory that's been floating around for a long time now, and I'd just like to write it
down here. [If you know who came up with this theory, leave a comment and I'll add their name here].
It goes something like this:

How did life start? Why? It is possible that, when a certain meteor fell from the sky to the earth, it had come from another solar system, and had some form of life on it. Chances are, that it was bacterial life, since that's what we think that life here started as... If not, what started us off?

The last question is, I find a very interesting one... I wonder if we'll ever find the origin of life.