Lindelof explaination for black goo...how it does the things it does...

Per DL from interview with him & scott... http://www.totalfilm.com/news/ridley-scott-reveals-prometheus-secrets-to-t3 The movie demonstrates what it does in certain circumstances. So, here’s what it does if it gets on worms; here’s what it does if it gets on your face; here’s what it does if someone just puts a little bit of it in your drink. Now we see that that lots of this is headed to Earth. Now, you used the word “weapon” – you’re extrapolating that based on the theory Janek [Idris Elba] has, because it looks like a payload to him; all these ships are loaded with this stuff, and they’re headed for Earth. The intent has to be to wipe us out, or is it to evolve us, or is it for something else? These are all hopefully questions and points of debate – frustrating for some – but ultimately the kind of science fiction. Why the two movies that Ridley did decades ago are still being discussed is this idea that when you walk out of the cinema that you have to go into a community and start to discuss. “Well, wait a minute, this is what I think happened.” And you’re hopefully mirroring the conversation that the characters are having in the movie, and more importantly this is why Shaw says what she says at the end of the movie. Which is, “I’m not going back to Earth and calling it a day, I need to know a little bit more about what’s happening here.”