Shop by category

    About

    The Drake Equation provides a framework for estimating the potential number of extraterrestrial civilizations by considering various astrophysical and biological factors. By taking into account variables such as the rate of star formation, the fraction of stars with planets, and the likelihood of those planets supporting life, the equation offers a systematic approach to evaluating the possibility of intelligent life beyond Earth. While it does not provide a definitive answer, the Drake Equation serves as a tool for stimulating scientific inquiry and guiding the search for extraterrestrial intelligence.
    Location: United StatesMember since: Jan 01, 2015

    All feedback (16)

    • otis_the_sf_guy (36736)- Feedback left by buyer.
      Past year
      Verified purchase
      Thank you very much. ALL THE BEST! - Otis
    • booksrun (144788)- Feedback left by buyer.
      Past year
      Verified purchase
      Hope to deal with you again. Thank you.
    • brettstang5 (212)- Feedback left by buyer.
      More than a year ago
      Verified purchase
      Fast payment, good transaction.
    • lazbit (124)- Feedback left by buyer.
      More than a year ago
      Verified purchase
      Great buyer!
    • dandcoll (85686)- Feedback left by buyer.
      More than a year ago
      Verified purchase
      Great communication. A pleasure to do business with.
    • dsdealz (265)- Feedback left by buyer.
      More than a year ago
      Verified purchase
      Hope to deal with you again. Thank you.
    Reviews (1)
    Roku Ultra 4K Streaming Media Player w/HDR - Black - 4640R - UNIT ONLY
    Sep 08, 2020
    Great product as advertised
    The unit came exactly as the add and well wrapped. It has a broken optical port but with Audio Reverse Channel (ARC) being a superior method of connection it was not really needed and made this purchase a fantastic deal.

    About

    Use this space to tell other eBay members about yourself and what you’re passionate about. Give people more reasons to follow you!610/1000