::If someone else had enough research to back it up (not you, because it would be original research), then you could add a section about theories of life on other planets.  I think it's a pretty common idea, but I would have to check my references before I would post anything.  I seem to remember once hearing about such life forms on Mars...but I honestly don't remember.  Just make sure you cite your sources and make it clear that this is all theoretical.