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NOVA ScienceNOW

Aliens in the Milky Way?

  • By Susan K. Lewis
  • Posted 07.01.08
  • NOVA scienceNOW

Microbes on Mars might be impressive, but the average Earthling would really be wowed by news of a full-blown, advanced civilization on a planet beyond our own. What’s the likelihood that such a civilization exists in our galaxy? Explore the arguments, then take our poll: Do you believe ET is out there, capable of phoning home?

Launch Interactive

Do you think alien civilizations exist beyond Earth? Explore the arguments, then cast your vote.

Credits

Images

(alien face)
© Yegor Tsyba/iStockphoto
(Earth, Milky Way, meteorite, sci-fi city, sci-fi spaceship, Hubble deep field, radio telescopes)
© NASA; (Antarctica) © Liesl Clark for WGBH/NOVA;
(chimpanzee)
Courtesy of UNWF;
(octopus)
Courtesy of NOAA;
(equation, alien)
© WGBH/NOVA

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  • The Drake Equation

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  • Will We Ever Find ET?

    What are the odds that smart aliens exist in the universe?

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