 There are other philosophical as well as scientific questions about pain. Do animals feel pain? If they do, is it comparable to the way we feel pain? What are the social, economical, ethical and religious implications of affirmative answers to these questions? How can animal pain be scientifically studied? What should be the methodology of scientific research on animals in general and of animal pain in particular? How can we project the results obtained by pain research on animals onto humans (or vice versa)? Parallel or similar questions arise in the case of fetuses and young infants that are even more pressing and urgent for obvious reasons. What is the relationship between pain and pleasure, or pain and emotions in general? What are the ethical and religious significance and implications of pain? These and many other questions remain to be the focus of many researchers in the field. (The literature addressing these questions is huge and still growing; consult the bibliography of publications on pain cited in the Other Internet Resources section below for representative works.) 