Inscribed matter as an energy-efficient means of communication with an extraterrestrial civilization

  title={Inscribed matter as an energy-efficient means of communication with an extraterrestrial civilization},
  author={Christopher Rose and Gregory Wright},
It is well known that electromagnetic radiation—radio waves—can in principle be used to communicate over interstellar distances. By contrast, sending physical artefacts has seemed extravagantly wasteful of energy, and imagining human travel between the stars even more so. The key consideration in earlier work, however, was the perceived need for haste. If extraterrestrial civilizations existed within a few tens of light years, radio could be used for two-way communication on timescales… 
Will ET write or radiate: inscribed matter vs electromagnetic channels
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