The 1890s was an exciting time in American biology, a time of great intellectual debate and turmoil. Much of this activity centered on the now-famous Evening Lectures delivered at the Woods Hole Marine Biological Laboratory on Cape Cod, where leading biologists gathered to research the leading issues of the day. There was no better way to learn about what was being discussed and debated at the cutting edge of biology than through the Evening Lectures. The lectures of outstanding scientists such as C. 0. Whitman, E. B. Wilson, E. G. Conklin, J. Loeb, and T. H. Morgan redefined our thinking about biology.

These Evening Lectures stimulated major biological revolutions: the conversion of embryology to an independent discipline; the beginnings of ethology; the rise of genetics and especially cytogenetics; and the application of chemistry and physics to cell function-the birth of what is now called cell biology. Some of the central problems that scientists still puzzle over were first proposed at Woods Hole.

Not only are these lectures important scientific accomplishments, they also provide an invaluable record of the beginnings of a truly American school of biology. Printed in a limited edition, they have remained inaccessible to many people interested in knowing more about the meteoric rise of American biology. Jane Maienschein has selected key lectures, written an introductory essay, and provided brief explanations of the significance and impact of each lecture. Ernst Mayr, distinguished biologist and historian, has added a Foreword about the intellectual importance of the lectures to the formation of American biology; and Paul Gross, present Director of the Marine Biological Laboratory, has contributed an Epilogue that conveys the excitement and later significance of the 1890s.

Too tiny to see with the naked eye, the human embryo was just a hypothesis until the microscope made observation of embryonic development possible. This changed forever our view of the minuscule cluster of cells that looms large in questions about the meaning of life. Embryos under the Microscope examines how our scientific understanding of the embryo has evolved from the earliest speculations of natural philosophers to today’s biological engineering, with its many prospects for life-enhancing therapies. Jane Maienschein shows that research on embryos has always revealed possibilities that appear promising to some but deeply frightening to others, and she makes a persuasive case that public understanding must be informed by up-to-date scientific findings.

Direct observation of embryos greatly expanded knowledge but also led to disagreements over what investigators were seeing. Biologists confirmed that embryos are living organisms undergoing rapid change and are not in any sense functioning persons. They do not feel pain or have any capacity to think until very late stages of fetal development. New information about DNA led to discoveries about embryonic regulation of genetic inheritance, as well as evolutionary relationships among species. Scientists have learned how to manipulate embryos in the lab, taking them apart, reconstructing them, and even synthesizing—practically from scratch—cells, body parts, and maybe someday entire embryos. Showing how we have learned what we now know about the biology of embryos, Maienschein changes our view of what it means to be alive.

Saving lives versus taking lives: These are the stark terms in which the public regards human embryo research--a battleground of extremes, a war between science and ethics. Such a simplistic dichotomy, encouraged by vociferous opponents of abortion and proponents of medical research, is precisely what Jane Maienschein seeks to counter with this book. Whose View of Life? brings the current debates into sharper focus by examining developments in stem cell research, cloning, and embryology in historical and philosophical context and by exploring legal, social, and ethical issues at the heart of what has become a political controversy.

Drawing on her experience as a researcher, teacher, and congressional fellow, Jane Maienschein provides historical and contemporary analysis to aid understanding of the scientific and social forces that got us where we are today. For example, she explains the long-established traditions behind conflicting views of how life begins--at conception or gradually, in the course of development. She prepares us to engage a major question of our day: How are we, as a 21st-century democratic society, to navigate a course that is at the same time respectful of the range of competing views of life, built on the strongest possible basis of scientific knowledge, and still able to respond to the momentous opportunities and challenges presented to us by modern biology? Maienschein's multidisciplinary perspective will provide a starting point for further attempts to answer this question.