Are we alone here this is an exiting question we should ask ourself we are living in about thousands of other planet but is this earth only planet that have humans in it or is there many other planets if its there then havent they met us or why didnt anyone saw them or why did god created so many planets if only humans live in only one this is the most difficult question. There are many of pictures made on aliens killing human is that true than there is another danger waiting for us in alien like we have global warming  nuclear destrution and natural commodity so people should live there life happily and be live everybody peacefully