Are we alone? : philosophical implications of the discovery of extraterrestrial life /

gan Davies, P. C. W.
Cyhoeddwyd 1995

The biological universe : the twentieth-century extraterrestrial life debate and the limits of science /

gan Dick, Steven J.
Cyhoeddwyd 1996

Carl Sagan's cosmic connection : an extraterrestrial perspective /

gan Sagan, Carl, 1934-
Cyhoeddwyd 2000

Earth, life and the universe : exploring our cosmic ancestry /

gan Tritton, K. P.
Cyhoeddwyd 2001

Exobiology /

gan Ponnamperuma, Cyril, 1923-
Cyhoeddwyd 1972

Extraterrestrials, where are they? /

Cyhoeddwyd 1982

Here be dragons : the scientific quest for extraterrestrial life /

gan Koerner, David
Cyhoeddwyd 2000

An introduction to astrobiology /

Cyhoeddwyd 2004

Life as we do not know it : the NASA search for (and synthesis of) alien life /

gan Ward, Peter Douglas, 1949-
Cyhoeddwyd 2005

Life in the universe.

Cyhoeddwyd 1995

Lifecloud : the origin of life in the universe /

gan Hoyle, Fred, 1915-2001
Cyhoeddwyd 1978

Origins of life on the earth and in the cosmos /

gan Zubay, Geoffrey L.
Cyhoeddwyd 2000