Renee R. Anspach is an associate professor of sociology at the University of Michigan in Ann Arbor and author of Deciding Who Lives: Fateful Choices in the Intensive-Care Nursery.

Lance Nelson is professor of theological and religious studies at the University of San Diego. He is an expert on religion and ecology in Hindu India, including the religion’s attitudes toward animals.

Vijaya Nagarajan is an associate professor in the college of arts and sciences at the University of San Francisco, where she teaches on religion and the environment. She is an expert in the religious traditions and ecology of South India.

Rabbi Mike Comins is the founder of TorahTrek, an organization that connects Jewish spirituality to outdoor adventures. He is the author of A Wild Faith: Jewish Ways Into Wilderness, Wilderness Ways Into Judaism. He lives in Los Angeles. Contact him through the form on TorahTrek’s website.

Heather Ann Clements is a professor of systematic theology at Azusa Pacific University in Azusa, Calif. She has written about an Anabaptist and Mennonite environmental ethic.

George Daley is a stem cell biologist with the Whitehead Institute and Harvard Medical School. He supports a bill that would allow embryonic stem cell research in Massachusetts.

Susan P. Bratton is a professor in the environmental studies department at Baylor University in Waco, Texas, with an expertise in the interface between religion and environmental ethics. She is the author of Environmental Values in Christian Art (2007).

Thomas Anthony Shannon is professor of religion and ethics at the Worcester Polytechnic Institute in Worcester, Mass. He wrote Made in Whose Image?: Genetic Engineering and Christian Ethics (Humanity Books, 2000) and co-wrote New Genetic Medicine: Theological and Ethical Reflections (Rowman & Littlefield, 2003).

The Rev. John Langan is a professor of philosophy at Georgetown University in Washington, D.C. He wrote the entry “Stem Cell Research and Religious Freedom” for Stem Cell Research: New Frontiers in Science and Ethics.