With this theory all the creatures around now or most of them would have to also be aliens. Some animals also become extinct by being too efficient in their role as well like a group carnivore that has reduced its preys numbers to such a point the group begins dying out because the isn't enough food source, another thing is animals like chimps display traits that are also out of sync, for example they are the only other animal that will go to war with rival groups even if they have everything they need in their own territory they will seek out and forcefully take over other areas.

Evolution isn't random, but the mutations are. I agree with the above. It all seems ridiculously unlikely. I just cannot believe that I, a slug, a wasp an octopus an elephant and a hawk had the same ancestor, however many million times removed. 

Probably no, and that would beg the question: where did the aliens come from? You can't dodge the question with this hypothesis.

This the theory your thinking of?

http://news.nationalgeographic.com/news/2013/09/130905-mars-origin-of-life-earth-panspermia-astrobiology/

Who cares where it started?
Ice crystals in space -> somehow end up on mars, life forms there -> meteorite carries it to earth.

So what? that doesnt make us aliens.

Common, look at how short a time periode it took us to transform wolves into dogs.

And how many differnt breds of those we ve made.

Same with pigs, horses, cows ect.

I dont think its unreasonable that if you go far enough back, we shared the same ancestors with alot of animals.

Right.  The process isn't random and the mutations are.

It doesn't seem unlikely at all, at least to me.  It's just a problem of scales.  Humans live about 100 years at best.  Our scale of time is years.  All of recorded history is a sliver of time on earth that is beyond insignificant. 

When you can thing of time on a grander scale, it's not really hard to believe that things could change that much.  Assuming you accept that genes change over time, and really try to imagine billions of years, it doesn't only seem likely but inevitable.

I just can't see how, under any period of time, and any circumstances, that bacteria could eventuallt transform into a human

But what caused it? Why did it start? If it's there, what made it be there? What determined it? Nothing determined it? If nothing determined it, then nothing should exist at all. If something determined it to be there, then things make sense. But then what can that something possibly be? Nature? But that's just a made up term to pretty much describe chaos or the lack of something controlling. Nature doesn't exist. The only way nature could exist is if the rules that it creates (gravity, energy speed up/slow down, matter vs. anti matter, etc.) have to have been determined by something with intelligence. If there is no something with intelligence, then how is their rules to nature? You can't say evolution is logical so of course it's natural, because in what way is it logical if there is no supreme thing to hold it up to? What even determines logic?

Whatever people believe started evolution, what start that? And I've heard/read so many differnet theories, including the one on the universe expanding/contracting infinetely, but I say again to that and to all other theories as to why things are the way they are, what caused them in the first place if there isn't God? Seriously, I want a serious response to this. Every other time people just blow past that question because they either don't know or they don't want to answer.

Aliens just mean from outside of your territory and not naturalized. Extraterrestrial just means outside of the earths atmostphere.  The theory is that since we do not operate like much of the animal kingdom that we could probably be from elsewhere. Based on our brain activity, we act outside of normal kingdoms laws. We overpopulate, we create technology to make up to what we naturally lack or are too lazy to use and we dont have much appreciation for nature outside of its superficial beauty and understanding what we can use it for. We were much more in harmony with nature and the animal kingdom when we were in tribes. Again, our capacity for mentally creating a artificial world of our own trumps the case of a harmony with nature itself. We could ive with nature, but we would have to get over ourselves, essentially.