Do Aliens or Extraterrestrial Beings exist?

Many of us has long wondered about the existence of aliens and if so have they attempted to communicate with us? Aliens are so common amongst the Entertainment Industry.

With the vast complexity of this multifaceted subject, thousands of documents regarding UFOs have been surfaced on the net.

On 14 May 2008, The Vatican's chief astronomer announced that there is no conflict between believing in God and in the possibility of "extraterrestrial beings".

Which means we are now entering a new era where we look at the universe in a different way from what it was before. It has became a reality for us when on July 20 1969, astronaut Neil Armstrong and Buzz Aldrin became the first men to land on the moon. Just like aliens visiting from another world. If mankind could travel to other planets,

Why couldnt extraterrestrial beings visited earth before?