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  2. Drake equation - Wikipedia

    en.wikipedia.org/wiki/Drake_equation

    The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way Galaxy. [ 1 ] [ 2 ] [ 3 ] The equation was formulated in 1961 by Frank Drake , not for purposes of quantifying the number of civilizations, but as a way to stimulate scientific dialogue at the first ...

  3. Rare Earth hypothesis - Wikipedia

    en.wikipedia.org/wiki/Rare_Earth_hypothesis

    The Rare Earth equation is Ward and Brownlee's riposte to the Drake equation. It calculates , the number of Earth-like planets in the Milky Way having complex life forms, as: According to Rare Earth, the Cambrian explosion that saw extreme diversification of chordata from simple forms like Pikaia (pictured) was an improbable event.

  4. Rare Earth: Why Complex Life Is Uncommon in the Universe

    en.wikipedia.org/wiki/Rare_Earth:_Why_Complex...

    The authors also argue that due to the immense size of the universe, even if another habitable planet like Earth does exist elsewhere, meaning that the Earth is not the only planet in the universe with complex life, such planets would still only appear in relatively small numbers compared to planets that are habitable only to bacteria. Such ...

  5. Fermi paradox - Wikipedia

    en.wikipedia.org/wiki/Fermi_paradox

    The Drake equation has been used by both optimists and pessimists, with wildly differing results. The first scientific meeting on the search for extraterrestrial intelligence (SETI), which had 10 attendees including Frank Drake and Carl Sagan , speculated that the number of civilizations was roughly between 1,000 and 100,000,000 civilizations ...

  6. Extraterrestrial life - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_life

    In 1961, astronomer and astrophysicist Frank Drake devised the Drake equation as a way to stimulate scientific dialogue at a meeting on the search for extraterrestrial intelligence (SETI). [ 34 ] [ better source needed ] The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial ...

  7. The Drake vs. Budden dispute, explained! - AOL

    www.aol.com/drake-vs-budden-dispute-explained...

    OPINION: It all made sense to me when I learned that Drake used to look up to Joe Budden. The post The Drake vs. Budden dispute, explained! appeared first on TheGrio.

  8. Drake vs. Michael Jackson: How the numbers show this is ... - AOL

    www.aol.com/drake-vs-michael-jackson-numbers...

    Usher, Justin The post Drake vs. Michael Jackson: How the numbers show this is a one-sided debate appeared first on TheGrio. For the last few decades, scores of music lovers have been clamoring to ...

  9. How Does Weight Loss Work? 6 Tips to Finally Start ... - AOL

    www.aol.com/does-weight-loss-6-tips-115700334.html

    How to Start Losing Weight: 6 Tips. Many things about weight loss might be out of your control — like genetics or your set-point weight. But the good news is there are many things you can ...