Listening is only the beginning
Radio searches, atmospheric chemistry and waste heat offer different ways to look for technology beyond Earth.
Explore research, public records and open questions.
Radio searches, atmospheric chemistry and waste heat offer different ways to look for technology beyond Earth.
A useful question becomes a testable scientific claim only when its assumptions are made explicit.
One unusual radio observation, decades of questions, and no confirmed extraterrestrial identification.
A 2025 preprint revisits historical observations and proposes an astrophysical interpretation. The original signal remains a case to examine.