[4][7] Jupiter resembles prehistoric Earth with a rich fauna full of lifeforms such as dinosaurs and mastodons in the 1894 novel A Journey in Other Worlds by John Jacob Astor IV.
[4][6][10][11] Most writers portrayed the inhabitants of Jupiter as being human, including Marie Corelli in the 1886 novel A Romance of Two Worlds and Cornelius Shea in the 1905 novel Mystic Island; Or, the Tale of a Hidden Treasure.
[4][12] Some portrayed Jovians as giant humans, including Albert Waldo Howard in the c. 1895 novel The Milltillionaire and William Shuler Harris in the 1905 novel Life in a Thousand Worlds.
[1][13] In the satirical 1886 novel A Fortnight in Heaven by Harold A. Brydges, an Earthling who visits Jupiter finds a futuristic version of America and discovers that the planet is populated by giant counterparts of Earth persons.
[4] Some writers proposed that native lifeforms would have adaptations to the expected high surface gravity in the form of a low stature as in the 1939 short story "Heavy Planet" by Milton A. Rothman or a large number of legs to distribute their weight on as in the 1931 novel Spacehounds of IPC by E. E.
[5][23][24] In the 1944 short story "Desertion" by Clifford D. Simak (later included in the 1952 fix-up novel City), humans who have been thus transformed find Jupiter a preferable place to live and refuse to leave.
[1][5][6] Other writers resolved the issue of the presumed-harsh conditions of Jupiter by only having robots go there; in the 1942 short story "Victory Unintentional" by Isaac Asimov such robots encounter hostile aliens who mistake them for living beings, and in the 1957 short story "Call Me Joe" by Poul Anderson, a remotely controlled artificial creature explores the Jovian surface.
[1][6][23] By the late 1950s, it was generally accepted that the atmosphere of Jupiter was for all practical purposes bottomless and the idea of a solid surface beneath it fell into disuse.
[1] In the 2002 novel Manta's Gift by Timothy Zahn, humanity makes contact with intelligent life in the Jovian atmosphere, and in the 2000 novel Wheelers by Ian Stewart and Jack Cohen, it is discovered that there are entire floating cities there.
[5][25][26] Descents into the atmosphere are commonplace, seen in such works as the 1960 short story "The Way to Amalthea" by Soviet science fiction authors Arkady and Boris Strugatsky, the 1972 novel As on a Darkling Plain by Ben Bova, and the 1977 novel If the Stars are Gods by Gregory Benford and Gordon Eklund.
[27][31] Europa is depicted as having a breathable atmosphere and native lifeforms on the side of the planet tidally locked towards Jupiter in the 1936 short story "Redemption Cairn" by Stanley G.
[1][6] The colonization of Ganymede has been depicted in numerous works, including the 1964 novel Three Worlds to Conquer by Poul Anderson, the 1975 novel Jupiter Project by Gregory Benford, and the 1997 short story "The Flag in Gorbachev Crater" by Charles L.