Well it depends on what they were like and the opinion of the general public. One it could be a great thing if they were more advanced than us so we could make a huge leap in technology. But this could also be negative because anything with agriculture could lead to mutation in our crops. With weapons the good side would be increase safety but there would also be more deaths in wars, more crime and more world tension. There's always the possibility of heavy racism or even a genocide. This could also provoke WWIII. So in all it would be mixed.
No one knows.
Uh... No.
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.
Depends if they can cloak their ships or if they can use stealth or not. Etc etc.
No, it is not true that Martians are aliens. The term "Martian" refers to beings or things that come from or are associated with the planet Mars. While the possibility of life existing on Mars is still being explored, there is no confirmed evidence of aliens or extraterrestrial life on Mars or any other planet.
Both animals came to earth from aliens.
We won't know until we can all see them.
I would hope we would try to greet them as friends until proven otherwise. The fact is that if aliens have the technology to come to earth, I don't think we would have much hope of winning a war with them.
Dolphins are not satanic, they are aliens that came to earth to warn us of the horrible future
the guitar was designed and first made by aliens that came down to earth
there isn't any proof of any alien spacecraft even exists but even if aliens exist they would have some sort of spacecraft to go to earth in because there isn't any other known way of getting living things from planet to planet.
Is there any reason to think that aliens are all cereal killers?