A profound question about the nature of extraterrestrial intelligence raises a crucial debate between current technology and future potential. The central question revolves around how advanced alien civilizations could develop intelligence, considering whether based on silicon chips, similar to our modern artificial intelligence, or more efficient systems based on synthetic biology. This reflection gains strength when considering the implications for galactic exploration and the enigmatic Fermi Paradox.
The alien intelligence dilemma: silicon or biology
Our current technology has artificial intelligence (AI) as its crown, built on silicon chips. These components are derived from high-purity silica sand, a process that involves intensive extraction and chemical refining. Although powerful, silicon-based AI demands gigawatts of power for cognitive tasks that the biological human brain performs on just 20 watts. This imposes a significant limitation in long-term space exploration scenarios.
In contrast, synthetic biology emerges as a potentially revolutionary alternative. In the future, advanced understanding of biology could allow the creation of synthetic brains inside bodies that consume nutrients from a planet’s surface. Such machines would be exponentially more energy efficient and adaptable to different environments.
- Lower power consumption:Complex tasks require fractions of the energy currently demanded.
- Greater environmental adaptability:Capable of operating in diverse conditions without robust infrastructure.
- Lifetime self-repair capability:Designed to last indefinitely, extending their longevity.
- Potential for scaled-up brains:Possibility of developing intelligences with superior cognitive capabilities.
The Galaxy Gap and the Von Neumann Probes Paradox
The idea of Von Neumann probes – autonomous, self-replicating, self-repairing robots – is central to interstellar exploration. Theoretically, if these machines traveled at just 1% the speed of light, they could colonize the Milky Way in a few hundred thousand years. On a cosmic scale, this is an extremely short period.
However, empirical reality presents a glaring contradiction: there is no physical evidence of such automated systems nor of major galactic engineering projects. This absence raises the Fermi Paradox. The lack of self-replicating probes could mean that no civilization technologically superior to ours exists or has existed in the galaxy, or that there are not yet understood constraints, such as software mutation limits or existential risks, that would impede the development and proliferation of this technology.
Could we be probes of an extraterrestrial civilization?
A thought-provoking thought arises when considering the possibility that humans themselves are the aforementioned intelligent, self-replicating, self-repairing probes. This hypothesis suggests that our existence on Earth could be the result of the synthetic biology skills of an advanced alien civilization. If most stars formed billions of years before the Sun, other civilizations may have achieved a technological future that we still glimpse.
In this context, the advancement of synthetic biology and the creation of augmented brains would far surpass the feats of silicon AI, leading to an era where interstellar exploration would be driven by synthetic biology-based Von Neumann probes. This perspective redefines the search for extraterrestrial life, suggesting that it could be much closer than we imagine.
Avi Loeb’s search for answers and Project Galileo
Professor Avi Loeb, a prominent figure in the field of astrophysics, is actively involved in the search for evidence of extraterrestrial intelligence. As chairman of the UAP (Unidentified Anomalous Phenomena) Science Advisory Board for several US government agencies, including the White House and the Pentagon, he leads the Galileo Project.
The goal of Project Galileo is to scientifically investigate the possibility of alien visitations and determine the nature of the intelligence of any “guests.” Loeb, bestselling author and founding director of Harvard University’s Black Hole Initiative, inspires a wide audience with his academic courage and bold scientific approaches, such as his analyzes of ‘Oumuamua and 3I/Atlas. His work encourages new generations to dedicate themselves to physics and science, making knowledge accessible beyond elite academic circles.