Gaylord Nelson’s legacy is known and respected throughout the world. He was a founding father of the modern environmental movement and creator of one of the most influential public awareness campaigns ever undertaken on behalf of global environmental stewardship: Earth Day. Nelson died in 2005, but his message in this book is still timely and urgent, delivered with the same eloquence with which he articulated the nation’s environmental ills throughout the decades. He details the planet’s most critical concerns—from species and habitat losses to global climate change and population growth. In outlining strategies for planetary health, Nelson inspires citizens to reassert environmentalism as a national priority. Included in this reprint is a new preface by Gaylord Nelson’s daughter, Tia Nelson.

Seeking to reenergize Americans' passion for the space program, the value of further exploration of the Moon, and the importance of human beings on the final frontier, Claude A. Piantadosi presents a rich history of American space exploration and its major achievements. He emphasizes the importance of reclaiming national command of our manned program and continuing our unmanned space missions, and he stresses the many adventures that still await us in the unfolding universe. Acknowledging space exploration's practical and financial obstacles, Piantadosi challenges us to revitalize American leadership in space exploration in order to reap its scientific bounty. Piantadosi explains why space exploration, a captivating story of ambition, invention, and discovery, is also increasingly difficult and why space experts always seem to disagree. He argues that the future of the space program requires merging the practicalities of exploration with the constraints of human biology. Space science deals with the unknown, and the margin (and budget) for error is small. Lethal near-vacuum conditions, deadly cosmic radiation, microgravity, vast distances, and highly scattered resources remain immense physical problems. To forge ahead, America needs to develop affordable space transportation and flexible exploration strategies based in sound science. Piantadosi closes with suggestions for accomplishing these goals, combining his healthy skepticism as a scientist with an unshakable belief in space's untapped—and wholly worthwhile—potential.

This is a completely updated and revised version of a monograph published in 2002 by the NASA History Office under the original title Deep Space Chronicle: A Chronology of Deep Space and Planetary Probes, 1958-2000. This new edition not only adds all events in robotic deep space exploration after 2000 and up to the end of 2016, but it also completely corrects and updates all accounts of missions from 1958 to 2000--Provided by publisher.

We are at the cusp of a golden age in space science, as increasingly more entrepreneurs—Elon Musk, Richard Branson, Jeff Bezos—are seduced by the commercial potential of human access to space. But Beyond Earth does not offer another wide-eyed technology fantasy: instead, it is grounded not only in the human capacity for invention and the appeal of adventure, but also in the bureaucratic, political, and scientific realities that present obstacles to space travel—realities that have hampered NASA's efforts ever since the Challenger disaster. In Beyond Earth, the authors offer groundbreaking research and argue persuasively that not Mars, but Titan—a moon of Saturn with a nitrogen atmosphere, a weather cycle, and an inexhaustible supply of cheap energy—offers the most realistic, and thrilling, prospect of life without support from Earth.

An engaging account of our quest for habitable environments, recounting fascinating recent discoveries and providing insight into future space missions.

A drive to recycle cans on Earth Day teaches the children of the Maple Street School Save-the-Planet Club about place value.

A comprehensive and enlightening history of Earth Day 1970, one of the largest and most important political events of the twentieth centuryThe first Earth Day is the most famous little-known event in modern American history. Because we still pay ritual homage to the planet every April 22, everyone knows something about Earth Day. Some people may also know that Earth Day 1970 made the environmental movement a major force in American political life. But no one has told the whole story before.The story of the first Earth Day is inspiring; it had a power, a freshness, and a seriousness of purpose that are difficult to imagine today. Earth Day 1970 created an entire green generation. Thousands of Earth Day organizers and participants decided to devote their lives to the environmental cause. Earth Day 1970 helped to build a lasting eco-infrastructure - lobbying organizations, environmental beats at newspapers, environmental-studies programs, eco sections in bookstores, community ecology centers.