New Releases by Carl Sagan

Por que gastar fortunas com programas espaciais quando há tantos problemas aguardando solução a poucos metros de nossas casas? Para Sagan, um dia o conhecimento do espaço poderá significar nossa sobrevivência como espécie. ''Pálido ponto azul'' revela como as descobertas científicas alteraram nossa percepção de quem somos e do lugar que ocupamos no Universo - e nos incita a refletir sobre o uso que daremos a esse conhecimento.

Discusses the theory of nuclear winter, its predicted consequences, and what can be done to prevent a war.

An analysis of the potentially devastating consequences of nuclear war discusses the environmental impact of nuclear winter and proposes changes in international nuclear policies

“A history of the human brain from the big bang, fifteen billion years ago, to the day before yesterday . . . It''s a delight.”—The New York Times Dr. Carl Sagan takes us on a great reading adventure, offering his vivid and startling insight into the brain of man and beast, the origin of human intelligence, the function of our most haunting legends—and their amazing links to recent discoveries. “How can I persuade every intelligent person to read this important and elegant book? . . . He talks about all kinds of things: the why of the pain of human childbirth . . . the reason for sleeping and dreaming . . . chimpanzees taught to communicate in deaf and dumb language . . . the definition of death . . . cloning . . . computers . . . intelligent life on other planets. . . . Fascinating . . . delightful.”—The Boston Globe “In some lost Eden where dragons ruled, the foundations of our intelligence were laid. . . . Carl Sagan takes us on a guided tour of that lost land. . . . Fascinating . . . entertaining . . . masterful.”—St. Louis Post-Dispatch

La disposición general de esta obra permanece como en la edición rusa: una presentación primero de formación astronómica, luego de la naturaleza de la vida y de su posible concurrencia en nuestro sistema solar y, finalmente, un tratamiento de la posibilidad de que existan en los planetas de otras estrellas civilizaciones técnicas comunicativas adelantadas.

“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

Une synthèse en trois parties: La nature des comètes - Origines et destinées des comètes - Les comètes et l''avenir.

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.

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.