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  2. Review: Should Humans Settle Mars? This Book Is Skeptical. - AOL

    www.aol.com/news/review-humans-settle-mars-book...

    A City on Mars is a counterbalance to the growing optimism over space exploration.

  3. A City on Mars - Wikipedia

    en.wikipedia.org/wiki/A_City_on_Mars

    A City on Mars: Can We Settle Space, Should We Settle Space, and Have We Really Thought This Through? is a 2023 popular science book by Kelly and Zach Weinersmith.It covers the current state of knowledge of space settlement given changes in the economics of space travel in the 2010s and 2020s, with a particular focus on challenges that the authors consider unresolved or underestimated.

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

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

    Rare Earth was succeeded in 2003 by the follow-on book The Life and Death of Planet Earth: How the New Science of Astrobiology Charts the Ultimate Fate of our World, also by Ward and Brownlee, which talks about the Earth's long-term future and eventual demise under a warming and expanding Sun, showing readers the concept that planets like Earth ...

  5. Pale Blue Dot (book) - Wikipedia

    en.wikipedia.org/wiki/Pale_Blue_Dot_(book)

    The first part of the book examines the claims made throughout history that Earth and the human species are unique. Sagan proposes two reasons for the persistence of the idea of a geocentric, or Earth-centered universe: human pride in our existence, and the threat of torturing those who dissented from it, particularly during the time of the Roman Inquisition.

  6. Stephen Hawking: 'Human race has no future' without space travel

    www.aol.com/news/2016-09-27-stephen-hawking...

    Stephen Hawking is a supporter of space travel, in part, because he thinks the survival of humanity depends on it. Hawking shared these thoughts in an afterword for Julian Guthrie's book "How to ...

  7. Man After Man - Wikipedia

    en.wikipedia.org/wiki/Man_After_Man

    The genetically engineered humans of the future, in total numbering about 40 species through the book, occur in several different and diverse forms, with genetically engineered forms first being slave races created to survive underwater and in space without the need of protective gear and suits, described as the "ultimate triumphs of the ...

  8. The best scientific arguments for why aliens exist - AOL

    www.aol.com/article/2015/09/28/the-best...

    The famous Drake equation allows us to estimate how many alien civilizations might exist in the Milky Way. It looks like this: N=R*(fp)(ne)(fl)(fi)(fc)L, with each variable defined below.

  9. Human presence in space - Wikipedia

    en.wikipedia.org/wiki/Human_presence_in_space

    Human presence in outer space began with the first launches of artificial object in the mid 20th century, and has increased to the point where Earth is orbited by a vast number of artificial objects and the far reaches of the Solar System have been visited and explored by a range of space probes.

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