Are We Missing the Universe's "Noosignatures"?

The article explores a significant gap in astrobiology between searching for "biosignatures" (signs of life) and "technosignatures" (signs of advanced civilizations). While we've focused on finding evidence of life or technology, there's a middle ground often overlooked—the subtle signs that might indicate a civilization in its nascent stages of technological development. This new paper, "Signs and Signatures of Intelligence," underscores the importance of filling this gap to better understand the universe's full range of potential discoveries, as it could reshape our approach to exploring extraterrestrial life and intelligence.