Three and a half billion years ago, Mars resembled earth. It was warm and wet and could have supported primitive organisms. If life once existed on Mars, might it have originated there and traveled to earth inside meteorites blasted into space by cosmic impacts? Davies builds on recent scientific discoveries and theories to address larger questions of existence: What, exactly, is life? Is it the inevitable by-product of physical laws, as many scientists maintain, or an almost miraculous accident? Are we alone in the universe, or will life emerge on all earthlike planets? And if there is life elsewhere in the universe, is it preordained to evolve toward greater complexity and intelligence? Through his search for answers to these questions, Davies explores the ultimate mystery of mankind's existence -- who we are and what our place might be in the unfolding drama of the cosmos.

    This book leads the reader from simple graphs through planar graphs, Euler's formula, Platonic graphs, coloring, the genus of a graph, Euler walks, Hamilton walks, more. Includes exercises. 1976 edition.

    It's the desire to find your own freedom and happiness. It's about letting go of limitations, and learning how to live successfully. This book is a series of 16 simple "pep talks" for that self-development journey. No hype, no rituals, no follow-on courses. Just a series of conversations to help you finally discover your own true freedom. Forget The Secret, set aside religious texts and ignore the so-called gurus. This book will guide you straight to the only true authority on your own self-development. You.

    Raymond Franz, former member of the governing body shares his true account in an honest, unbiased manner of his experience of his life as a Jehovah's Witness and the events that led up to his formal resignation from the Watchtower Bible and Tract Society.

    Composed of such luminaries as Kurt Gödel and Rudolf Carnap, and stimulated by the works of Ludwig Wittgenstein and Karl Popper, the Vienna Circle left an indelible mark on science.Exact Thinking in Demented Times tells the often outrageous, sometimes tragic, and never boring stories of the men who transformed scientific thought. A revealing work of history, this landmark book pays tribute to those who dared to reinvent knowledge from the ground up.