The Search for Extraterrestrial Life: From Smoke to Gardens ⚡ экспресс
Traditionally, technosignatures are about searching for 'pollution': excess heat or industrial gases. This approach, as the authors note following indigenous scientists, likens extraterrestrial intelligence to colonial expansion: we look for those who transform the environment, not those who live in harmony with it. The work suggests searching for technosignatures that sustain nature — a kind of 'eco-friendly' trace of technology, converging with biosignatures. This is an unexpected angle: perhaps we haven't found other civilizations precisely because we're looking for the wrong signs.
We've been scanning the skies for factory smoke, but what if intelligent civilizations are growing gardens? Astronomers usually look for technosignatures — chemical pollution in the atmospheres of exoplanets. This method is like tracking down colonizers who leave a trail of soot. However, perhaps truly advanced societies don't destroy their home but take care of it. Their technologies are invisible to our instruments — they don't belch smoke; on the contrary, they clean the air and restore ecosystems.
How can we detect such harmony? Spectral analysis—studying atmospheric composition through starlight—could reveal anomalously clean air or signs of technologies that actively green the planet. This is no longer a search for destruction, but a search for creation. Ironically, pollution itself might not come from technology: Earth's volcanoes spew more sulfur each year than our entire industry.
🎯 The Fermi paradox (the silence of the Universe) might be explained by the fact that we were looking for smoke instead of a fresh breeze.