No. I am not looking, and have never seen convincing evidence they exist.
An extension of natural human curiosity.
Yes they can!
there is no definite proof but aliens are likely to exist
I know that they found The Reapers around 2180 so they had to find the other aliens before that.
As far as we currently know there are no aliens and therefore at this time they have no importance. However, should we discover that there are aliens then this will be VERY important and may change the world. It is therefore probably quite important to try and find out if there are any aliens.
As far as we have been able to discover, there are no aliens on Mars. It is a lifeless planet (although there is some possibility that there are microorganisms living in the ground).
Sounds like you could be mis-remembering "Invaders from Mars!"
It is unknown if there is alien life out there or not. But due to the size of the galaxy it is highly likely there are aliens out there.
Alien v Preditor
maybe someone will get them and discover that the weird eye monster
If they are from the Middle East that is quite likely. this would apply to both legal and illegal aliens.
although aliens and Hitler very likely exist Hitler was not likely to be an alien.