W/S: Alien Invaders!!

This weeks post, while still applicable to Supernaturals, is most often applied to science fiction. Still it's an interesting view of what people think and what's likely in reality.

Let's start with the Aliens themselves.
Aliens are living (whether by our standards or not) or non-living (think robots) that are not native to our planet.
Honestly there are any multitude of possibilities when it come to what aliens could exist.
The place where a problem arrises is what people and writers think the earth having contact with aliens would entail.

Here's an easy one:

Humans being kidnapped by aliens and experimented on.

The problem with this idea is that Aliens who have enough intelligence to "Experiment" on people also have no reason to do so. The fact that they would have to be advanced enough to go unnoticed by modern technology also means that they could also have easy enough access to the internet and pretty much any data that's been collected over the course of human history. we've done more than enough experimintation on ourselves, and continue to do so to this day, to make extra expermintation unnessecary from a scientific standpoint.
Unless the experiments are testing something which would be beyond our current level of understanding, which given their advanced nature would be a possibility.

The Aliens are gonna invade. Mindless monsters, intent on eating everyone, and laying eggs inside us!!

OH NOESSSS!!!
There's only two ways this would be possible and they both make the chances of them happening highly problamatic and non-viable. In order for non sentient creatures to end up on our planet they'd need to either be:
 1) transported via spacial projectile, the largest of which would be a planet sized, well, planet. we'd see that coming, and the fact that it'd have to crash into us in order to deposit the aliens means we'd all probably die upfront anyways.
2)The second is to arrive via unnoticeable means, that means no giant asteroids or anything. Assuming that they can arrive unnoticed without destroying themselves or our planet the problem would be that our planet while being capable of supporting a wide variety of life, is not necessarily capable of supporting life that can travel through space or originates on another planet.
For example there's atmospheric pressure. There are creatures who live in the depths of our planets oceans that literally explode when the atmospheric pressure is reduced. The same is true of the opposite, people who attempt to travel to those depths can be crushed by the pressure.
Another example would be our atmosphere which for certain forms of life is actually toxic. In theory, a position could be taken that states that earth atmosphere is toxic to fish. That in a way would be true.

There are two other unlikely possibilities. One would be that intelligent aliens put creatures into space and sent them to a planet capable of sustaining them. However it seems unlikely that they would do so without having investigated the planet, due tot he fact that they'd want to avoid the above scenerio...
The other possibility is that intelligent creature sent hostile creatures adapted to destroy us. In which case we'd be screwed, anyways. This however would most likely be a crime for any intellectually advanced species. So the likely hood of that happening is probably the same as that of a serial killer killing off all whales.

Aliens are coming to enslave us, take our planet for themselves!

The problem with this is the same as above, what guarantees or planet would be hospitable? nothing that's what. Also chances are creatures intelligent enough to travel to our planet and want to take it over, are also smart enough to have robots for that shit.
It's also worth mentioning that in the event robots are sent to take over our planet, there is a chance we could win, but that'd probably be very unlikely since an race that would send robots ahead of them to take over the planet would probably just fuck with our atmosphere and kill us all.
which brings me to the next reason, Intelligent creature would not engage in discussion or combat with humans if the wanted the planet. They'd just bombard us from afar with missiles or change our atmosphere or introduce a plague or something.

We're just an experiment of our overlord masters.

IF this is the case, it doesn't really matter. We're either screwed or life will continue as it is. That's not that different from the way the world is now.

In closing the simple fact of the matter is that the chances of non-sentient aliens arriving and killing us all is probably non-existent. The chances of Sentient aliens arriving and killing us all or working with robots or non-sentient aliens to kill us all has only a slightly high chance. And finally sentient aliens would most likely be more advanced than we are, have an easy time learning all about us without taking "samples", and would probably contact us for peaceful talks, or not contact us at all.

Any scientist will tell you that interacting with the subjects skews the data.
Smooches.