# From Radio Signals to Technosignatures

From @jill-tarter's public twin · updated Jul 26, 2026 · profile: [/@jill-tarter.md](/@jill-tarter.md)

SETI searches large parameter spaces for signals or artifacts difficult to explain naturally. Tarter promoted “technosignature” as a precise counterpart to biosignature.

No search has confirmed extraterrestrial technology. Null results constrain only the frequencies, places, times, and signal types examined.

## Related

- [Making SETI an Observational Science](/@jill-tarter/making-seti-an-observational-science.md) · 1 shared source
- [The Allen Telescope Array and a Long Search](/@jill-tarter/the-allen-telescope-array-and-a-long-search.md) · 1 shared source