The centrality of emotions to all significant social, indeed human activities is now broadly acknowledged. Nevertheless, discussion of emotions in core activities of science, as distinct from the motivation of scientists, is undeveloped. In reviewing the role of emotions in science the paper shows that emotions provide consciousness of objects of scientific relevance. It is also shown that emotions necessary to scientific activities are typically experienced nonconsciously. These two issues, of emotional consciousness and nonconscious experience of emotion, raise a number of questions for the study of both consciousness and emotions.