Insightful, good-humored essays on the possibilities of alien life and the uses of space exploration, based on an astrobiologist’s everyday conversations with his fellow humans—taxi drivers, to be precise.

If you’ve ever sat in the back seat of a taxi, you know that cabbies like to talk. Sports or politics, your job or theirs, taxi drivers are fine conversationalists on just about any topic. And when the passenger is astrobiologist Charles Cockell, that topic is usually space and what, if anything, lives out there.

Inspired by conversations with drivers all over the world, Taxi from Another Planet tackles the questions that everyday people have about the cosmos and our place in it. Will we understand aliens? What if there isn’t life out in the universe? Is Mars our Plan B? And why is the government spending tax dollars on space programs anyway? Each essay in this genial collection takes questions like these as a starting point on the way to a range of insightful, even poignant, observations. Cockell delves into debates over the inevitability of life and looks to both human history and scientific knowledge to consider what first contact will be like and what we can expect from spacefaring societies. He also offers a forceful argument for the sympathies between space exploration and environmentalism.

A shrewd and entertaining foray into the most fundamental mysteries, Taxi from Another Planet brings together the wisdom of scientific experts and their fellow citizens of Earth, the better to understand how life might unfold elsewhere.

Enigmatic for many years, cosmic rays are now known to be not rays at all, but particles, the nuclei of atoms, raining down continually on the earth, where they can be detected throughout the atmosphere and sometimes even thousands of feet underground. This book tells the long-running detective story behind the discovery and study of cosmic rays, a story that stretches from the early days of subatomic particle physics in the 1890s to the frontiers of high-energy astrophysics today.

Writing for the amateur scientist and the educated general reader, Michael Friedlander, a cosmic ray researcher, relates the history of cosmic ray science from its accidental discovery to its present status. He explains how cosmic rays are identified and how their energies are measured, then surveys current knowledge and theories of thin cosmic rain. The most thorough, up-to-date, and readable account of these intriguing phenomena, his book makes us party to the search into the nature, behavior, and origins of cosmic rays—and into the sources of their enormous energy, sometimes hundreds of millions times greater than the energy achievable in the most powerful earthbound particle accelerators. As this search led unexpectedly to the discovery of new particles such as the muon, pion, kaon, and hyperon, and as it reveals scenes of awesome violence in the cosmos and offers clues about black holes, supernovas, neutron stars, quasars, and neutrinos, we see clearly why cosmic rays remain central to an astonishingly diverse range of research studies on scales infinitesimally small and large.

Attractively illustrated, engagingly written, this is a fascinating inside look at a science at the center of our understanding of our universe.

A streak of light crosses the night sky as a bit of extraterrestrial material falls to Earth.

Meteorites, which range from particles of dust to massive chunks of metal and rock, bombard the Earth constantly, adding hundreds of tons of new material to our planet each day. What are these objects? How do we recover and study them? Where do they come from, and what do they tell us about the birth and infancy of the solar system? Why do many scientists now believe that meteorites have played a dramatic, albeit occasional, role in the evolution of life on Earth?

In Thunderstones and Shooting Stars, Robert T. Dodd gives us an up-to-date report on these questions. He summarizes the evidence that leads scientists to believe that most meteorites come from asteroids, although a few come from the moon and a few more from a planet, probably Mars. He explains how chondrites--the most numerous and primitive of meteorites--contribute to our evolving picture of the early solar system, and how some of them may tell us of events that took place beyond the sun and before its birth. Finally, he examines the controversial hypothesis that impacts by asteroids or comets have interrupted the evolution of life on Earth, accounting for such geological puzzles as the rapid demise of the dinosaurs.

Meteorites have been called "the poor man's space probe," for they are the only extraterrestrial rocks that we can collect without benefit of spacecraft. This lively and accessible book both illuminates the complex science of meteoritics and conveys a sense of its excitement. University teachers and students will appreciate its synthesis of new research on a broad range of topics, and amateurs will delight in its lucid presentation of a science that is unlocking many mysteries of Earth and space.