I heard a presentation recently that pointed out that, when you consider the age of the universe and our planet, the amount of time it took for life to appear and learn to send signals and space craft out into the universe was an incredibly short span of time.
If earthlings could learn do it so quickly, then it follows that all the aliens probably could have too. If there actually are any aliens.
The idea is that evidence of alien interaction should be as common as a shooting star. Why don't we experience alien interaction as common?
The conclusion of the presentation suggested that we may be more special than some give us credit for.
I found it to be an interesting twist on the "anything can happen" idea.
best regards,
mike