This journal is dedicated to Rav Moshe David Tendler z’’l, who was an American rabbi, a trained microbiologist, and a professor of medical ethics and biology at Yeshiva University. Rav Tendler combined his passions for religion and science – teaching about important medical ethics topics including organ donation, brain death, human experimentation, the theory of evolution, stem cell research, and non-approved medical treatments. One of his most famous rulings, announced in the 1970’s, determined that it was the functioning of the brain, and not the function of the heart, that amounts to death of an organism. Rav Tendler’s expert rulings were not limited to his religious community, rather extended to New York State laws and regulations in the medical field. His students remember him with an ever-present twinkle in his eyes and as a warm and caring professor who cared for each and every one of his students.