New Releases by Carl Sagan

“The scientific discoveries described in this book may turn out . . . to have been the most important research findings in the long history of science.” —Lewis Thomas, from the Foreward

Beschouwingen van een bekend Amerikaans astronoom over wetenschapsbeoefening, pseudo-wetenschap, UFO''s, science fiction, de samenleving, evolutie, buitenaards leven en godsdiensten.

The well-known astronomer and astrobiologist surveys current knowledge of the development of intelligence on Earth in various forms of life and explains his persuasion that intelligence must have developed along similar lines throughout the universe.

The Voyager Interstellar Record.

Lavishly illustrated discussion of the tools and techniques of astronomy, of Earth and the other planets, and of the possibility of life in other parts of the solar system.

"A translation, extension, and revision of [the author''s Vselennai︠a︡, zhiznʹ, razum]". Bibliography: p. 489-495.

Contrary to the conclusions previously drawn, the polar-cap recession data suggest the dark areas are highlands, because of the greater wind velocities and frost-vaporization rates anticipated for highlands. From the quasi-specular component of the radar power reflectivity and from the radar Doppler spectra, both functions of Martian longitude, the Martian dark areas are found to tend to have systematically higher elevations than the adjacent bright areas. Mean slopes of a few degrees or less are deduced, and elevation differences up to 17 km are inferred.