by The Dharma Bum » Tue May 07, 2013 8:26 pm
There are other possibilities as well. Perhaps a higher order intelligence that is native to earth that we just haven't become aware of yet is a possibility. ( a slight one, but who knows really?)
I agree the FTL hurdle is a difficult one to surmount. One the other hand who can say what kind of technology would be developed by a civilization that has existed for billions of years.