NASA: ‘Aliens could have visited Earth’
NASA was set up in part to find traces of extraterrestrial life in the universe.
While the government space agency has yet to find any definitive evidence that extraterrestrials exist, one NASA scientist believes we may have already been visited by them here on Earth.
The prediction comes at a significant time for the US space agency, after their InSight Mars probe landed successfully on the Red Planet, and its existing Curiosity Mars Rover spotted an unknown shiny object on the planet's surface.
In a new research paper, Professor Silvano P. Colombano claims that intelligent life may not be what we are used to and may not necessarily use the traditional building blocks, like carbon, that humanity is accustomed to.
Prof Colombano is a computer scientist at NASA Ames Research Center.
"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," he wrote in the paper.
So, if extraterrestrials are not carbon-based, what does that do to our assumptions about what to look for?
Well, a lot, Prof Colombano noted.
"Our typical lifespans 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," he said.
Prof Colombano also suggested that extraterrestrials may have figured out technology that humans cannot comprehend yet, making tasks such as interstellar travel possible.
"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 inquiry," he said.
Still, the scientist conceded that interstellar travel could be "an unbreakable barrier, over spans of thousands of years," but added that it could be possible depending on what we assume about various forms of life.
"Considering further that technological development in our civilisation started only about 10,000 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!" he said.
Prof Colombano, who holds a doctorate in biophysical sciences according to his LinkedIn page, also said that not every UFO sighting can be "explained or denied".
Instead he asked people to look through the "very large of amount of noise" when it comes to reporting on the subject.
This story originally appeared on Fox News and has been republished here with permission.