The re-evaluated Fermi paradox: Humans are probably the only intelligent species in the observable universe

Three researchers at Oxford University's Future of Humanity Institute are re-evaluating the Fermi paradox and concluding that humans are the only intelligent civilization at the present time.

The Fermi paradox implies the apparent contradiction in that there have been many claims that extraterrestrial civilizations exist but there is still some evidence to confirm it. This contradiction has long been a stumbling block in the quest for extraterrestrial intelligence or what is commonly referred to as SETI.

In the new study, this paradox was reevaluated using the Drake equation first proposed in the 1960s. The equation is used to calculate the odds of finding a smart life in the world. universe. The idea is that even with a small amount of evidence of the existence of another intelligent life, the massive number of places that could accommodate such a life should also produce a large number of. other observable civilizations.

In the end, the study concludes that from the available knowledge of individuals, there is a greater possibility that humans are the only intelligent species in the observable universe or in the entire pathway. Milky at this very moment.

The Fermi paradox

The paradox was proposed by the physicist Enrico Fermi in 1950. It is popular to have the intention to answer the question "where are the extraterrestrials". Since the Earth is part of a young planetary system, the paradox leaves the idea that the extraterrestrials have already visited this world. However, the extraterrestrials remained to be untested.

In 2013, Dr. Anders Sandberg, one of the authors of this study and a researcher from the university, has already proposed that according to the paradox of Fermi, other extraterrestrial beings are not dead but in hibernation or waiting for more favorable conditions. from the universe.

Drake equation

In the present study, however, Sandberg and two other colleagues re-evaluate the Fermi paradox by applying the parameters of Drake's equation. For their study, they incorporated models of chemical and genetic factors as life evolved in the universe. Their new assessment revealed a significant amount of scientific uncertainty with respect to other forms of intelligent life.

The equation used in the study, appeared online June 6 via the Cornell University Library, is mathematically expressed as N = R * x fp x x x x x x x L .

The symbol (N) represents the number of civilizations in the galaxy that may have the ability to communicate with humans. (N) can be determined by multiplying the average rate of star formation in the galaxy that is represented by the symbol (R *). The symbol (fp) represents the fraction of these stars that have planets; (n) represents the number of planets that can support life, (f) the number of planets that will develop life, (f) the number of planets that will develop intelligent life, (fc) the number of civilizations that would develop technologies of transmission, and finally (L) the duration during which these civilizations would have transmitted signals in the space.

The number of scientific uncertainties derived from their calculations was highly distributed and these uncertainties lead them to the conclusion that humanity is most likely alone in the galaxy.

"We found that even using the estimates in the literature (we took them and randomly combined the parameter estimates), the average number of civilizations in the galaxy could be quite high – say a hundred – and yet the probability that we are alone in the galaxy, that's 30%, "explained Sandberg.

This does not mean, however, that humans should stop pursuing the quest for extraterrestrial life. In fact, according to Sandberg, the level of uncertainty that they calculated was large enough to require the intervention of astrobiology and SETI to reduce these uncertainties on the parameters.

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