[enactolaelant]

Purextc69 -

Spoiler! 1. Spoiler! Why was the alien human on earth at the beggning, and why did he kill himself...
ridley spoke about this and said its about self sacrifice and how the engineers dna is so powerful it can kickstart life etc. its not 100% on earth. no comment on it being dumb, but thats what he said.

2. Spoiler! How did all our very very very distant ancestors draw a solar system/star system that is stated in the film could not be seen with the human eye.
because, ridley scott intended for jesus to be an engineer. so probably he spread the gospel and star charts.
im not even joking :/

3. Spoiler! Why were the 2 guys that got lost shitting themselves then when they see an alien worm they pull themselves together and want to touch it....
its hard to answer this without sounding snarky. in this scene i just see the characters behavior altering to fit the plot.

4. Spoiler! Why did the human aliens want to destroy earth? There is no explanation at all for this, and why create some advanced biology experiment to kill us considering there size and tech around them...
see [2]. we killed ridleys spsce jesus, is one reason they could be mad. about the tech? its not necessarily just to kill us.

5. Spoiler! Did you not think the birth of the alien that has no link to the other aliens in the other films, came out of knowhere.....
its showing how the eitr (black goo) ultimately leads to (some kind of) xenomorph alien being created

6. Spoiler! How was she able to move around after the operation that cut through her core stomach muscles.....
because really awesome staples. it was so silly.

7. Spoiler! How was she going to survive without food and water when leaving the planet to look for who created "them"...
because lindorf.

you can explain most of them with "ridley intended jesus to be an alien", "lindorf", "plot device" or "the myth of pandora".