Col Man wrote:intelligence is down to opinion.... maybe if there are aliens who 'visit' our planet they are so far advanced that we to them are not intelligent and therefore they would never contact us
lets just hope we find out...and the sooner the better

it would be nice to know... 'we are not alone'
peace and love

Let's run down on interspecies contact to date. Exhibit 1, a space-faring race of aliens that has technology capable of either travelling at incredible speeds or warping space. Exhibit 2, after discovering a planet with life and 'intelligent' life at that, they then:
-hide
-instruct humans in building huge pyramids and scratching shapes on the Nazca plains - they don't leave any physical evidence or the slightest clue why
-remain hidden by flying around in aircraft that shine incredibly bright lights that can be seen
-contact only power elites and give them technology
-buzz cars and trucks in remote areas
-kidnap humans in remote areas
-mutilate cattle, removing their organs through the rectum
-have sex with humans
-have sex at an extinct volcano with a French race-car driver AND tell him the secrets of the Universe
-dress in basic black suits, wear sunglasses and drive black late-model sedans in an attempt to stay anonymous
-fly black helicopters, even though they have far superior aircraft
-let humans shoot down their craft and or recover crashed craft and let them retrieve bodies and debris, and take no action about it, even though they wish to remain hidden