That's still unsure if they did or still do. Many movies have been made with them trying to kill us but the odds are that they're just as curious about us as we are of them.
It is impossible to tell.
no, and they probably never will
its a maybe we don't no yet by Joel Fraga
they would either be peaceful and leave us alone or deadly and kill us.
If by 'aliens' you mean intelligent extra-terrestrial beings, there is no plausible evidence that any have ever visited Earth. However, with billions of planets in the universe, it would be arrogant of us to believe that we are alone, as the only intelligent life forms that ever evolved. There must be 'aliens' out there.
Aliens from another world don't have to be dangerous. They might not even seem hostile to us if we ever come to their world or if they ever come to ours. It's a joke people spread that aliens sound spooky and say, "Take me to your leader."
No, the Aliens that use it, keep it under control.
Dont be thick
Aliens are more advanced then us if they came to earth but if they found out to late that the only way to kill them is to shoot them in Head then it is a fair fight.
Aliens from another world don't have to be dangerous. They might not even seem like monsters to us if we ever come to their world or if they ever come to ours. It's a joke people spread that aliens are green and say, "Take me to your leader."
Aliens will come down to earth and kill us all the end
are aliens different then us? yes because aliens are a strange foriegn