Lets assume that if they hadn’t reached the ability to fly in imitation hub caps then they wouldn’t be here (if they are).
Wonder what we would say if they only appeared now – flying wheel trim doesn’t have the same ring does it.
Personally I subscribe to the idea that they might already be here but we just don’t recognize them or they really don’t want to be seen, except to the most unbelievable members of society just for a laugh – hell, with our world history of xenophobia I wouldn’t want to appear out of the ordinary and can you imagine what the authorities would like to do if they thought a live dissection of an alien would help find Saddam? US Agent would be able to proclaim that the galaxy was also on the side of right and might, too! 😮

Flood – some would say he is out of this world on a daily basis.