I don't see any 'rod-like particles' in the drop of black goo on David's finger. Just reflections.
Agreed. No visible tiny rods.
To me the slime that David picked up on his fingers in the tunnel, and was looking through, is like the slime which is seen in the other Alien movies.
He was not looking through the black goo at that moment imo.
- That leads to the question; how could that kind of slime be in the tunnels if the Xenomorphs and Deacons have been gone on LV-223 for about 2000 years?
Could other creatures produce slime like that or could the slime be preserved on the walls of the tunnels?
- What did David see in the slime?
There was a movement of tiny bubbles/particles which indicates that it was active in someway.
And I think the black goo affects organisms with a view to mutating them into something capable of impregnating a host...
Holloway... obviously 'impregnates' (in an alien sense) Shaw with a cell whose DNA has been corrupted by the goo.
Holloway imo showed one aspect of the black goo it infects a sperm and that infected sperm then infects an egg.
- Overall however, the black goo infects any uninfected organisms it comes into contact with, mutating them into monsters.
The hammerpedes... doesn't appear to have a payload, so to speak. The one that entered Millburn just leaps out of his mouth after a while and nothing further is seen.
I think that would be the effect of the black goo on most organisms, mutating them into monsters with no sexual reproduction.
Fifield got an apparently massive dose of the stuff, which looks to have transformed him all at once and very quickly, resulting in an imperfect specimen capable of aggression and hatred only.
I agree that Fifield changed quickly (compared with Holloway) because he got a bigger dose of the black goo.
But I don't see Fifield as an "imperfect specimen".
To me this is what the black goo would do to a large, complex creature.
The black goo mutates small organisms in the complex creature like sperm and parasites.
- Eventually the parasites will take over the complex creature (such as a human) which results in the monster Fifield.
To me that is what would have eventually happened to Holloway if he had not been killed by Vickers.