Christopher Polge achieved distinction at a remarkably early stage of his career in biological research. He made key discoveries when he was in his twenties, and his work was internationally acclaimed when only just into his thirties. His name will always be associated with the deep–freeze preservation of mammalian spermatozoa and the massive boost that this gave to a fledgling artificial insemination industry,especially for the breeding of dairy cattle. Even so, his research contributions were wide–ranging, and their long–term influence onagriculture, medicine and biotechnology cannot be overestimated. Recognition came from many directions, perhaps most significantly as the recipient of the Japan Prize for Science and Technology for Biological Production in 1992.