Introductory essays by Viking Project scientist Gerald A. Soffen and Viking Orbiter scientist Conway W. Snyder describe the project, the spacecraft, selection of the Martian landing sites, and the experiments undertaken. The rest of the papers are by scientists involved in the project and comprise a record of the data obtained, the experiments, and their evaluation.
More than 50 years after the Mariner 4 flyby on 15 July 1965, Mars still represents the next frontier of space explorations. Of particular focus nowadays is crewed missions to the red planet. Over three sections, this book explores missions to Mars, in situ operations, and human-rated missions. Chapters address elements of design and possible psychological effects related to human-rated missions. The information contained herein will allow for the development of safe and efficient exploration missions to Mars.
Focusing on men from old families in England’s Wirral and West Lancashire regions, this survey traces the DNA of the local populace back to their Viking ancestors in order to determine the impact of past societies on their genetic make-up. Arguing that the areas exhibit many archaeological and historical features proving them to have had a clear Viking presence, this account provides background information on Viking settlements as well as conclusions drawn from the DNA testing. An illustrated example of how DNA methods can be used to learn about the past is also included.
Claims of Martian life continue to spur scientific debate; this partisan account summarizes the arguments to date. When several experiments conducted by the 1976 Viking Mars Landers returned positive results regarding signs of life, NASA scientists dismissed them as false positives. According to DiGregorio, this was based on nothing more than a refusal to accept the possibility of life beyond Earth. To bolster this argument, he surveys the history of the idea that life might exist on other planets, invoking such names as Giordano Bruno and Galileo. As our understanding of both biology and astronomy grew, the notion that life is not unique to Earth took hold in the minds of many scientists. The recent rise of the new science of exobiology opened doors to an understanding of how life might have arisen on any planet with the right conditions. Dr. Levin and Dr. Straat, who designed and built one of the Viking experiments, contribute two chapters summarizing the current status of this fascinating debate. The author's detailed research, as well as extensive interviews with Dr. Levin and others, highlights the intriguing evidence pointing to life on the Red Planet.
From Habitability to Life on Mars explores the current state of knowledge and questions on the past habitability of Mars and the role that rapid environmental changes may have played in the ability of prebiotic chemistry to transition to life. It investigates the role that such changes may have played in the preservation of biosignatures in the geological record and what this means for exploration strategies. Throughout the book, the authors show how the investigation of terrestrial analogs to early Martian habitats under various climates and environmental extremes provide critical clues to understand where, what and how to search for biosignatures on Mars. The authors present an introduction to the newest developments and state-of-the-art remote and in situ detection strategies and technologies that are being currently developed to support the upcoming ExoMars and Mars 2020 missions. They show how the current orbital and ground exploration is guiding the selection for future landing sites. Finally, the book concludes by discussing the critical question of the implications and ethics of finding life on Mars. - Edited by the lead on a NASA project that searches for habitability and life on Mars leading to the Mars 2020 mission - Presents the evidence, questions and answers we have today (including a summary of the current state of knowledge in advance of the ESA ExoMars and NASA Mars 2020 missions) - Includes contributions from authors directly involved in past, current and upcoming Mars missions - Provides key information as to how Mars rovers, such as ExoMars and Mars 2020, will address the search for life on Mars with their instrumentation
