Footprints of alien technology

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


If alien civilizations do, or did, exist, their technology will impact their environment. Some consideration has been given to the detection of large-scale astro-engineering, such as Dyson spheres. However, a very advanced technology might leave more subtle footprints requiring sophisticated scientific methods to uncover. We must not overlook the possibility that alien technology has impacted our immediate astronomical environment, even Earth itself, but probably a very long time ago. This raises the question of what traces, if anything, might remain today. I shall consider the possibilities of biological, geological and physical traces, and suggest ways that we might search for them.

Original languageEnglish (US)
Pages (from-to)250-257
Number of pages8
JournalActa Astronautica
StatePublished - Apr 1 2012


  • Astrobiology
  • Drake equation
  • Origin of life
  • SETI

ASJC Scopus subject areas

  • Aerospace Engineering


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