Directed Panspermia

Hi, This is my first post so apologies if it's drivel :-) A couple of days ago i saw some speculation on here to do with ancient astronauts (relating to the opening of the film and the technology of the Engineers), and thought i'd mention this as I hadn't seen any mention of it. Francis Crick, co-discoverer of the mapping of DNA, was of the opinion that evolution was not enough to give rise to our DNA, effectively he thought is demonstrated that there was likely to have been involvement by someone helping to nudge it along into the form it currently has (Engineers?). He called this 'directed panspermia', where a race could either seed DNA to see which ones grow in a particular planet or system, or to have visited and upgraded us in some respects. It's not a theory the conservative mainstream of science liked, but it did come from one of the pillars of modern science, and i'd be surprised if in researching the ideas for the film either RS or Lindelof had not come across it. And its from a better source than a lot of the unfounded gibberish Von Daniken tries to pass off as knowledge.