Valley Walls

Half a century ago a rag-tag group of innovators was building a foundation for modern American rock climbing from a makeshift home base in Yosemite. Photographer Glen Denny was a key figure in this golden age of climbing, capturing pioneering feats on camera while tackling challenging ascents himself. In entertaining short pieces enlivened by his iconic black-and-white images of Yosemite's big wall legends, Denny reveals a young man's coming of age and provides a vivid look at Yosemite’s early climbing culture. He relates such precarious achievements as hauling water in glass gallon jugs up the east face of Washington Column, nailing the 750-foot Rostrum in a punishing heat wave, and dangling overnight on El Capitan’s Dihedral Wall in a lightning storm. Each true tale captures the spirit of historic Camp 4, where Denny and others plan the next big climb while living on the cheap and dodging park rangers.

Science fiction writer Jack Van Horne has been struggling with an increasing case of Agoraphobia for about the past ten years. This mental affliction makes him powerless to leave his current surroundings of the street his apartment is situated. His doctor has tried many types of medication with zero effect to break him from his self-imposed prison. The impact of his mental illness prevents Jack from finishing the final book of his space fantasy series, which has increased the psychological strain on his well being. Jack’s editor believes he is just suffering from writer’s block. However, Jack knows that he isn’t well and that people are dismissing his mental illness as a genuine illness. When Jack is tasked with watching his niece for two days out of the sanctity of his safe zone surroundings, his journey begins to the West Valley Wall. In Jack’s mind, this adventure will either aid in his sanity or cement his demise.

In this engrossing and accessible book, Doug Macdougall explores the causes and effects of ice ages that have gripped our planet throughout its history, from the earliest known glaciation—nearly three billion years ago—to the present. Following the development of scientific ideas about these dramatic events, Macdougall traces the lives of many of the brilliant and intriguing characters who have contributed to the evolving understanding of how ice ages come about. As it explains how the great Pleistocene Ice Age has shaped the earth's landscape and influenced the course of human evolution, Frozen Earth also provides a fascinating look at how science is done, how the excitement of discovery drives scientists to explore and investigate, and how timing and chance play a part in the acceptance of new scientific ideas. Macdougall describes the awesome power of cataclysmic floods that marked the melting of the glaciers of the Pleistocene Ice Age. He probes the chilling evidence for "Snowball Earth," an episode far back in the earth's past that may have seen our planet encased in ice from pole to pole. He discusses the accumulating evidence from deep-sea sediment cores, as well as ice cores from Greenland and the Antarctic, that suggests fast-changing ice age climates may have directly impacted the evolution of our species and the course of human migration and civilization. Frozen Earth also chronicles how the concept of the ice age has gripped the imagination of scientists for almost two centuries. It offers an absorbing consideration of how current studies of Pleistocene climate may help us understand earth's future climate changes, including the question of when the next glacial interval will occur.