Why no Neos/Xenos or whatevers after the entire population was infected.

We only see them when the covenant crew arrives...and why have none of the bodies decomposed. Moss grew in the ship and plant life was abundant but no decomposition of the engineers...and we did not see a planet over run by any of the bugs

And on the entire planet there are no other cities of engineer habitats? Ugh.

The pathogen David released killed them all in a matter of minutes. Their bodies broke down, what was left was husks. Everything on the planet was killed off by that pathogen. David did experiment with the insects and animals but needed bigger hosts. You do see some of his proto xenos in his lab, once the humans arrived from Covenant the pathogen spores were able to create the white neo, then in the lab the eggs were able to facehug a member and then the black xeno was born.

That whole part with the pathogen is weird and needs further explanations.

It is supposed to kill lifeforms. Check.

The black goo infused Engineer/local fauna-mutations are lifeforms. Check.

Pathogen kills them too. Check.

What is left are only plant based lifeforms with the spores.

So we can say as long their are non-plant based fleshy lifeforms this whole situation is a perpetuum mobile which you can consider as a form of indefinite sterilisation/preparation process.

I think it's the quantity released.

Note how it only takes a very small amount to mutate.

As in Prometheus a small container killed and broke down the sacrificial Engineer.

The black goo does....whatever the director/screenwriter wants it to do in a certain scene....that's why it's so flexible.

A cup of it in an Engineer breaks him down to molecules that meld with an environment and basically "seeds" a planet...a drop will just make a human sick with some sort of infection until they're burnt to a crisp...inhalation causes a backburster...falling face first into it causes a person to become an unstoppable Frankenstein....it goes on and on.

There's no real science behind it. It's a cop out to help explain how the Alien came to be, with no real regards as to how and why it works. 

What I don't understand about the goo, is if it kills everything organic, except plantlife, then where did the mosquito things come from?

Plus, during the bombing scene you can sort of see black creatures breaking out of the engineers which are in the process of dying or being converted by the goo

Good Question...   Didn't David mention something in Covenant about how the pathogen either infects the host, or kills them outright.   I think it was merely the amount of goo that killed the engineers.  

AdamPD

"Plus, during the bombing scene you can sort of see black creatures breaking out of the engineers which are in the process of dying or being converted by the goo"

I am almost positive I noticed this too but I brought it up in another thread and two or three people told me I was incorrect. Not really sure whether it was my mistake or theirs, but I'll be watching more closely on my second viewing which should either be this weekend or sometime in the next week.

I'll get back to you.

"Plus, during the bombing scene you can sort of see black creatures breaking out of the engineers which are in the process of dying or being converted by the goo"

I saw the movie just yesterday, the engineers are simply vomiting up goo, it's breaking down their bodies like it did to that first engineer in Prometheus. 

From what we've seen, the Xenomorphs and now the Neomorphs require some kind of host to evolve into the creatures we see in the movie. There still a mystery of how the eggs were produced as well as the spore pods.

They weren't frozen but scorched. Like what happens to human remains in intense fires. But just like any chemical, it's effects could be different depending on the method it's delivered. A vague comparison could be like a low dose of radiation causes more cancer than a higher dose because with a higher dose, cells that could have become cancer are killed.

I didn't understand why the pathogen had the same characteristic as the black matter from the spores (which supposedly developed years after David dropped the bomb). Whatever came out of the capsule was not liquid and it moved by itself almost homing in on targets. I was hoping for it to be something more along the lines of the bombs explode in mid-air and the goo rains down on the population and they become infected not die straight away. Thus giving David a lot of specimens to study if that's what he wanted to do... 

I do buy into what Bimie_James says though, that sounds plausible

Lilly (Svanya)

I'm not sure if AdamPD and I are talking about the exact same moments, but I could have sworn there are at least two engineers lying on the ground that got death closeups and appeared to have creatures come out of them.

In one of these instances, it looked like a solid black mass came out of his neck (with black goo spraying around it).

For the other instance, the engineer kind of falls into a roll, and once he is face up, another solid black mass with black goo spraying around it appears to erupt out of his chest and lay on the ground moving just a little.

This happens so fast and momentarily amongst all the other engineers who are merely vomiting black goo, that most people could have easily missed it. But I hands down swear that there were at least two engineers who appeared to have something solid erupt out of them.

1. Any predatory mutations produced would have likely run out of prey in the course of ten years and starved to death.

2. The engineers' bodies were mummified as anything living within them, even microbes, would have been affected by the Pathogen.

3. We only see a tiny area of the planet, so no telling whether there are other settlements (although it's quite likely this was a colony world for the Engineers). What we do know is that the Pathogen essentially killed off all animal life on the planet during that ten-year period.

dmx1138

I completely agree. All good points. It didn't seem to me as if the engineers were necessarily dissolving or being scorched. They just looked like they were getting sick. Mummification makes a good bit of sense in regards to their appearance.

@QueenElizabethShaw Ah, maybe. I'll have to go see the movie again and watch carefully. To me it seemed like their bodies were violently breaking down from the inside out, with a lot of goo splashing and vomiting. 

The answer my friend is blowing in the wind the answer is blowing in the wind...

In other words what the who what is what why the where. Times fifty! I think that is just about where all the logic in these films seem to be going...It really feels like the black goo is what ever is needed for the plot LOL! :s

And on the entire planet there are no other cities of engineer habitats? Ugh.

Yeah this is annoying. It tends to happen in all sci-fi type of stories and movies. Imagine if aliens landed on Earth near a remote town in the amazon and believed that was every human being on the whole planet