And remember, our 'species' has only about a few million years history..(40,000 years in it's current form)...and for only about 100 years have we been able to create 'signals' and begin to fly. Our entire civilization could fall apart in the NEXT 1000 years.
What are the chances of other civilizations being 'viable' at times we could possible encounter them?


Oh...and why are aliens not only humanoid, but small, spindly, with big heads and large eyes?