She is perhaps the best known and most studied fossil hominid of the twentieth century, the benchmark by which other discoveries of human ancestors are judged.”–From Lucy’s LegacyIn his New York Times bestseller, Lucy: The Beginnings of Humankind, renowned paleoanthropologist Donald Johanson told the incredible story of his discovery of a partial female skeleton that revolutionized the study of human origins. Lucy literally changed our understanding of our world and who we come from. Since that dramatic find in 1974, there has been heated debate and–most important–more groundbreaking discoveries that have further transformed our understanding of when and how humans evolved. In Lucy’s Legacy, Johanson takes readers on a fascinating tour of the last three decades of study–the most exciting period of paleoanthropologic investigation thus far. In that time, Johanson and his colleagues have uncovered a total of 363 specimens of Australopithecus afarensis (Lucy’s species, a transitional creature between apes and humans), spanning 400,000 years. As a result, we now have a unique fossil record of one branch of our family tree–that family being humanity–a tree that is believed to date back a staggering 7 million years.Focusing on dramatic new fossil finds and breakthrough advances in DNA research, Johanson provides the latest answers that post-Lucy paleoanthropologists are finding to questions such as: How did Homo sapiens evolve? When and where did our species originate? What separates hominids from the apes? What was the nature of Neandertal and modern human encounters? What mysteries about human evolution remain to be solved?Donald Johanson is a passionate guide on an extraordinary journey from the ancient landscape of Hadar, Ethiopia–where Lucy was unearthed and where many other exciting fossil discoveries have since been made–to a seaside cave in South Africa that once sheltered early members of our own species, and many other significant sites. Thirty-five years after Lucy, Johanson continues to enthusiastically probe the origins of our species and what it means to be human.

    Martin A. Lee traces the dramatic social history of marijuana from its origins to its emergence in the 1960s as a defining force in a culture war that has never ceased. Lee describes how the illicit marijuana subculture overcame government opposition and morphed into a dynamic, multibillion-dollar industry. In 1996, California voters approved Proposition 215, legalizing marijuana for medicinal purposes. Similar laws have followed in more than a dozen other states, but not without antagonistic responses from federal, state, and local law enforcement. Lee, an award-winning investigative journalist, draws attention to underreported scientific breakthroughs that are reshaping the therapeutic landscape. By mining the plant’s rich pharmacopoeia, medical researchers have developed promising treatments for cancer, heart disease, Alzheimer’s, diabetes, chronic pain, and many other conditions that are beyond the reach of conventional cures.Colorful, illuminating, and at times irreverent, this is a fascinating read for recreational users and patients, students and doctors, musicians and accountants, Baby Boomers and their kids, and anyone who has ever wondered about the secret life of this ubiquitous herb. Smoke Signals is the winner of the American Botanical Council's James A. Duke Excellence in Botanical Literature Award for 2012