According to a NASA scientist, intelligent alien life may have visited earth and human beings missed it.
Silvano P. Colombano, a member of NASA’s Intelligent Systems Division, wrote a paper titled “New Assumptions to Guide SETI Intelligence,” and presented it at the “Decoding Alien Intelligence Workshop.” In the paper, Colombano asserted:
Recent discoveries due to the Kepler project have identified planetary system as old as 10.4 Gyr (Kepler-10)  , and 11.2 Gyr (Kepler-444) . Considering that the age of our solar system is about 4.5 Gyr, earth like planets could exist that are 6 Gyr, older than our own. Considering further that technological development in our civilization started only about 10K years ago and has seen the rise of scientific methodologies only in the past 500 years, we can surmise that we might have a real problem in predicting technological evolution even for the next thousand years, let alone 6 Million times that amount!
Considering further that technological development in our civilization started only about 10K years ago and has seen the rise of scientific methodologies only in the past 500 years, we can surmise that we might have a real problem in predicting technological evolution even for the next thousand years, let alone 6 Million times that amount!
In light of these numbers, I think we need to re-visit even our most cherished assumptions: Interstellar travel is impossible or highly unlikely … Radio waves continue to be the major form of communication for thousands or millions of years … Intelligent civilizations would be based on carbon life … We have not been, and are not being… visited.
Vis-à-vis the idea that alien civilizations might not be based on carbon life, Columbano stated:
I simply want to point out the fact that the intelligence we might find and that might choose to find us (if it hasn’t already) might not be at all be produced by carbon based organisms like us. How might that change the above assumptions about interstellar travel? Our typical life-spans would no longer be a limitation (although even these could be dealt with multi-generational missions or suspended animation), and the size of the “explorer” might be that of an extremely tiny super-intelligent entity. And how might this change our assumptions about openness or desire to communicate with other civilizations?
Columbano posited that it was well within the limits of reason to speculate that alien life had visited earth, writing:
It seems to me that SETI has ignored (at least officially) the potential relevance of UFO phenomena for three reasons: 1) The assumption of extremely low likelihood of interstellar travel, 2) The very high likelihood of hoaxes, mistaken perceptions or even psychotic events in UFO phenomena, and 3) The general avoidance of the subject by the scientific community.
I think the approach the scientific community could take, instead, is very similar to what SETI has done so far: find the signal in the noise. In the very large amount of “noise” in UFO reporting there may be “signals” however small, that indicate some phenomena that cannot be explained or denied. If we adopt a new set of assumptions about what forms of higher intelligence and technology we might find, some of those phenomena might fit specific hypotheses, and we could start some serious enquiry.
This content was originally published here.