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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. List of free PC games - Wikipedia

    en.wikipedia.org/wiki/List_of_free_PC_games

    The following is a list of PC games that have been deemed monetarily free by their creator or copyright holder. This includes free-to-play games, even if they include monetized micro transactions. List

  4. List of commercial video games released as freeware

    en.wikipedia.org/wiki/List_of_commercial_video...

    The ROMs of the game and its sequel were formerly offered by the owner Randel Reiss for free download. In 2021, however, the rights to both games were purchased by Piko Interactive, leding the download links for the ROMs to disappear from Technopop's website, [121] but they are still available for free download on Zophar's Domain.

  5. List of open-source software for mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_open-source...

    This free software had an earlier incarnation, Macsyma. Developed by Massachusetts Institute of Technology in the 1960s, it was maintained by William Schelter from 1982 to 2001. In 1998, Schelter obtained permission to release Maxima as open-source software under the GNU General Public license and the source code was released later that year ...

  6. Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

  7. The Search for Life: The Drake Equation - Wikipedia

    en.wikipedia.org/wiki/The_Search_for_Life:_The...

    The Search for Life: The Drake Equation is a 2010 BBC Four television documentary about that equation, which is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy. [1] [2] It was presented by Dallas Campbell.

  8. List of freeware video games - Wikipedia

    en.wikipedia.org/wiki/List_of_freeware_video_games

    This is a selected list of freeware video games implemented as traditional executable files that must be downloaded and installed. Freeware games are games that are released as freeware and can be downloaded and played, free of charge, for an unlimited amount of time. This list does not include: Open source games (see List of open-source video ...

  9. Extraterrestrial intelligence - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_intelligence

    The Drake equation is a probabilistic framework used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy. [ 12 ] Search for extraterrestrial intelligence