To find aliens, we must first unlearn what it means to be human
In short: For decades, our search for extraterrestrial life was limited by a narrow mirror: we looked for things that resembled us. Now, astrophysicist Sara Seager argues that the greatest obstacle to discovery isn't technology, but the boundaries of our own imagination regarding what intelligence actually looks like.
Sara Seager, an MIT professor and pioneer in exoplanet research, is leading a paradigm shift in astrobiology. Traditionally, humanity has searched for life by projecting our own biological blueprints onto the cosmos. Seager suggests this approach may be fundamentally flawed because it fails to account for intelligence that is utterly unlike our own. As we look toward the stars, she emphasizes that our biggest challenge is learning to see past these human-centric limits.
A key component of this new framework involves searching for "technosignatures"—physical evidence of advanced civilizations rather than just biological markers. This includes identifying artificial light or satellite swarms in distant systems. Furthermore, Seager considers the possibility of post-biological life. As artificial intelligence accelerates on Earth, she explores whether the first extraterrestrial intelligences we encounter might be synthetic rather than organic.
Seager’s practical work supports these theoretical shifts. She has led major initiatives like Project Starshade—a concept for direct imaging to find true Earth analogs—and the Venus Morning Star Missions, which investigate if the atmosphere of Venus can support life. By combining high-level theory with missions designed to characterize exoplanet atmospheres and interior structures, her work seeks to identify where the laws of physics and chemistry allow for life, regardless of its form.
This shift matters because it moves science from a search for 'twins' to a search for 'others.' By focusing on atmospheric biosignature gases and technosignatures across thousands of known exoplanets, Seager’s research aims to prepare humanity for the possibility that life in the universe may not just be different—it might be unrecognizable.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: The search for aliens is shifting its criteria | Sara Seager
- Also: Sara Seager » MIT Physics
- Also: aeroastro.mit.edu — Sara Seager - MIT AeroAstro
To cite this card, link to https://intellectplus.co.uk/app/science-the-search-for-aliens-is-shifting-its-criteria-sara-seager.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Science · Latest · A–Z · All topics
