[Dimensio]

So, you believe that all life came from a single organism (we'll just forget where the organism came from)...to me the alien story sounds better

I don't know where all life on earth ultimately originated. I lack the knowledge and the biological expertise to formulate a personal hypothesis.

there haven't been any sightings of transitional forms though.

This said by someone who has been given multiple links to evidence of transitional forms. Like I said, you ignore the evidence because if you pretend that it isn't there you can imagine that you're not really lying when you deny its existence.