dr3b on 28 March 2012
You should watch BBC's Wonders of the Universe, it talks alot about this subject. If you follow the creation of the Universe from a scientific perspective we are all made up of stardust and the same elements that are seen throughout the Universe, so we share the same building blocks of any other life that may exist.
The place were we may see a difference is in life that isn't carbon based as we are, such as Silicon or Nitrogen based lifeforms (if they exist).
