Aliens… You know them.
Grey and big headed or black with acid instead of blood inside them.
There are books, movies, animes, comics and other awesomely cool stuff about them. Meeting a – sentient – life form from another planet will be the single most important moment of our history. But have you ever asked yourself what should you do if you are the one to make the first contact with them?
Here, check this cool infographic out: