"The Mad Moon" is a
science fiction
Science fiction (often shortened to sci-fi or abbreviated SF) is a genre of speculative fiction that deals with imaginative and futuristic concepts. These concepts may include information technology and robotics, biological manipulations, space ...
short story
A short story is a piece of prose fiction. It can typically be read in a single sitting and focuses on a self-contained incident or series of linked incidents, with the intent of evoking a single effect or mood. The short story is one of the old ...
by American writer
Stanley G. Weinbaum, first published in the December 1935 issue of ''
Astounding Stories
''Analog Science Fiction and Fact'' is an American science fiction magazine published under various titles since 1930. Originally titled ''Astounding Stories of Super-Science'', the first issue was dated January 1930, published by William Cl ...
''. As did his earlier stories "
A Martian Odyssey
"A Martian Odyssey" is a science fiction short story by American writer Stanley G. Weinbaum originally published in the July 1934 issue of ''Wonder Stories''. It was Weinbaum's second published story (in 1933 he had sold a romantic novel, ''Th ...
" and "
Parasite Planet", "The Mad Moon" emphasizes Weinbaum's alien ecologies. "The Mad Moon" was the only Weinbaum story set on
Io.
Plot summary

It is the 22nd century
and protagonist Grant Calthorpe is a former sport-hunter collecting ferva leaves for the Neilan Drug Company, living near the Idiots' Hills with a parcat named Oliver. To evade stinging palms in the Ionan jungle, he rewards loonies with chocolate to collect the ferva leaves for him.
One day, suffering the native "white fever" and its "attendant
hallucination
A hallucination is a perception in the absence of an external stimulus that has the compelling sense of reality. They are distinguishable from several related phenomena, such as dreaming ( REM sleep), which does not involve wakefulness; pse ...
s", Calthorpe follows Oliver to Lee Neilan, daughter of the owner of Neilan Drug, also affected by the fever. Each human believes the other a hallucination, until Calthorpe confirms her report of a newly built slinker settlement, whereupon he rescues her from the local slinkers. Having restored her health, he learns that she had crash-landed an aircraft against the Idiots' Hills while trying to reach Herapolis.
When a party of slinkers undermines his shack, Calthorpe and Neilan flee into the Idiots' Hills, hoping the slinkers cannot follow them into the rarefied atmosphere. In a narrow valley between two peaks, they find a deserted city, apparently built by more-civilized previous generations of loonies. When opposed by the modern loonies, the slinkers form a narrow, dense mob, which Calthorpe destroys with a "flame pistol". This attracts Lee Neilan's father Gustavus, himself in search of her, and effects reunion. In gratitude to Calthorpe for saving his daughter, Gustavus offers him charge of a ferva plantation near Junopolis; whereupon Lee proposes her own marriage to Calthorpe.
Weinbaum's Io
In Weinbaum's
Solar System
The Solar SystemCapitalization of the name varies. The International Astronomical Union, the authoritative body regarding astronomical nomenclature, specifies capitalizing the names of all individual astronomical objects but uses mixed "Sola ...
,
Jupiter
Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a Jupiter mass, mass more than 2.5 times that of all the other planets in the Solar System combined a ...
radiates enough heat to create Earthlike environments on the
Galilean moons
The Galilean moons (), or Galilean satellites, are the four largest moons of Jupiter. They are, in descending-size order, Ganymede (moon), Ganymede, Callisto (moon), Callisto, Io (moon), Io, and Europa (moon), Europa. They are the most apparent m ...
. Io, the innermost Galilean satellite, has a tropical climate, so that two human settlements are located at the poles, Junopolis in the north and Herapolis in the south. Extending partway around the equator are the Idiots' Hills, whose peaks extend beyond Io's "dense but shallow" atmosphere. Weinbaum was ignorant that Io is
tidally locked
Tidal locking between a pair of co-orbiting astronomical bodies occurs when one of the objects reaches a state where there is no longer any net change in its rotation rate over the course of a complete orbit. In the case where a tidally locked ...
, and therefore showed Jupiter rise and set during the story.
Two intelligent races are native to Io: the loonies, a humanoid race of only moderate intelligence with large balloonlike heads upon long, slim necks, and the rodentine, warlike slinkers. (Members of the Harrison Expedition to
Mars
Mars is the fourth planet from the Sun. It is also known as the "Red Planet", because of its orange-red appearance. Mars is a desert-like rocky planet with a tenuous carbon dioxide () atmosphere. At the average surface level the atmosph ...
encounter a slinker in the story "
Valley of Dreams".) Another native is the parcat, a feline-like animal with a "single hind leg" and the ability to mimic phrases of human conversation. Ionan flora includes ferva leaves, used by pharmaceutical companies on Earth to create
alkaloids
Alkaloids are a broad class of naturally occurring organic compounds that contain at least one nitrogen atom. Some synthetic compounds of similar structure may also be termed alkaloids.
Alkaloids are produced by a large variety of organisms i ...
; bleeding-grass, which exudes red sap; and stinging palms, named for venomous barbs.
Collections
"The Mad Moon" appears in the following Stanley G. Weinbaum collections:
* ''The Dawn of Flame'' (1936)
* ''
A Martian Odyssey and Others'' (1949)
* ''A Martian Odyssey and Other Science Fiction Tales'' (1974)
* ''The Best of Stanley G. Weinbaum'' (1974)
* ''Interplanetary Odysseys'' (2006)
References
External links
*
{{DEFAULTSORT:Mad Moon, The
Short stories by Stanley G. Weinbaum
1935 short stories
Fiction set on Io (moon)
Works originally published in Analog Science Fiction and Fact
Short stories set in the 22nd century