Author defends doctrine of plurality of inhabited worlds by citing current astro-
r.or; ical discoveries and by analyzing and refuting objections.
Briggs, Michael H. Other astronomers in the universe? Southern str.rs, v. 18,
Sept. 1960: 147-151.
Author con:dder~ problems raised by the hypothesis that some cosmic radio
signals :i.re im.ellige1~tly produced.
----- Superior galactic communities. Spaceflight, v. 3, May l!l61: 109-110.
Author suggests that if there are intelligent extraterrestrials on pl&.nets in this
galaxy, they may be sc:entifically and technolof!:ically advanced enough to know
of both earth and of man as ari intelligent life form. Attempt by them to es-
tablish contact might be by radio transmissions, space probes, and emission
of radiation in the far infrared.
----- Terrestrial and extraterrestdal life. Spaceflight, v. 2, Oct. 1959: 120-121.
Hypothesis for origin of life on earth is given based on three assumptions: (1)
intelligent life existed somewhere in t' , universe prior to the beginning of life
on earth; (2) interplanetary flight is possible by these inte::lligences; and (3) life-
less earth was visited by extraterrestrials who either deliberately and accident-
ally left microbes behind when they departed. Variations oI and objections to
hypothesis are given.
Cade, C. Maxwell. Are we alone in space'i Discovery, v. 24. Apr. 20, 1963:
27-29.
----- A long, cool ll)()k at alien intelligences: Part I -- the non-uniqueness of man.
Flying saucer review, v. 13, Mar. -Apr. 1967: 24-25.
Author states that while there is a high probability for the existence of intelli-
gences ii' other parts vf the universe, it does not follow that they must bear
any resemblance to ourselves. H man is non-unique, it is because he is one
of many intelligent races, not because he is one of many humanoid, or even
biolo~cal species.
----- A long, cool look at alien intelligences: Part II -- the forms of intelligent
organisms. Flying saucer review, v. 13, May-June 1967: 13-15, 19.
Three classes of possible intelligent organism are consldered in detail: (1)
humanoid or non-humanoid biological organisms; (2) mechanical intelligences
such as self-programming computers; and (3) stable intelligent plasmoids.
----- Other worlds than ours. Lonc'.on, Museum Press, 1966. 248 p.
Consideration of possibility and implications of other worlds in space and
other worlds in time.
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