Technosignatures

Indicators of technology or intelligent activity on astronomical scales, guiding searches for extraterrestrial intelligence.

Articles about Technosignatures

Technology
3I/ATLAS Is Not an Alien Probe

3I/ATLAS Is Not an Alien Probe
Comet 3I/ATLAS—only the third confirmed interstellar object to visit our solar system—has been scanned by major radio and optical facilities; scientists report no signs of enginee…
Space
CIA’s Cryptic Answer on 3I/ATLAS

CIA’s Cryptic Answer on 3I/ATLAS
The CIA issued a Glomar reply to a FOIA request about interstellar visitor 3I/ATLAS, prompting fresh debate about what intelligence agencies may quietly monitor even when NASA cal…
Space
3I/ATLAS: Iceberg, Engine, or Enigma?

3I/ATLAS: Iceberg, Engine, or Enigma?
New observations of interstellar visitor 3I/ATLAS have revealed an odd chemistry, strange light-scattering and sunward jets — and a debate between natural explanations and calls t…