What If We Can’t Communicate With Aliens?

The Voyager Golden Record stands as humanity’s most ambitious attempt to communicate with extraterrestrial intelligence, yet profound questions remain about whether any alien species could ever interpret our interstellar message. Spearheaded by Carl Sagan and his team, this cosmic time capsule embodies our hope to reach beyond our world, but it also highlights the immense difficulties of creating signals that could be understood by a completely unknown form of consciousness.

Physicist Daniel Whiteson recalls an informal experiment where he showed the Pioneer plaque, another Sagan-designed message, to physics graduate students who had never encountered it before. Despite sharing human biology, culture, and scientific training, none could decipher its intended meaning. This underscores a critical point: even among our own species, symbolic communication faces interpretation barriers that might prove insurmountable across interstellar and interspecies divides.

NASA allotted just two weeks for Sagan to develop the Pioneer plaque design, a tight deadline that makes the effort all the more impressive. Whiteson emphasizes that the creators consciously avoided culturally specific elements like English or conventional mathematical symbols, recognizing their arbitrary nature. Instead, they sought universal principles, fundamental physics and mathematics, believing these might transcend human culture. Yet as Whiteson notes, every symbol remains a product of its origin, raising doubts about whether any representation can be truly universal.

The core challenge lies in the nature of symbolism itself. Any sign or image requires a shared context for accurate interpretation, something that cannot be guaranteed with alien intelligence. This realization forces us to examine our deepest assumptions about communication, science, and reality. The history of physics provides numerous examples where long-held beliefs were overturned by new evidence, suggesting we must remain open to the possibility that our understanding of universal truths might be profoundly limited.

Many assume mathematics and physics constitute a universal language that any technological civilization would share. Whiteson challenges this comforting notion, asking what it even means to “count” or perform basic mathematical operations. Our mathematical frameworks, while incredibly precise, emerge from human cognitive structures and might not reflect how other intelligences perceive quantitative relationships.

This epistemological humility extends to our interpretation of physical laws. Whiteson describes the common experience of physics students encountering quantum mechanical calculations where theoretical predictions match experimental results to nine decimal places. The stunning accuracy suggests we’ve tapped into fundamental realities, yet we cannot assume that alien scientists would conceptualize or symbolize these relationships in ways we would recognize. The universe may operate according to consistent principles, but how those principles are understood and communicated could vary dramatically across different forms of intelligence.

The possibility remains that we might develop entirely new frameworks for interstellar communication, perhaps based on fundamental physical constants or cosmic phenomena observable throughout the galaxy. Still, the challenge of interspecies understanding presents obstacles we can scarcely imagine, reminding us that the universe likely holds surprises that will force us to rethink what we consider self-evident.

(Source: Ars Technica)