A really enjoyable experience. Having retired from being an R&D chemist, I am now looking at the roots of my lifetime in Science. As a working scientist, it is too easy to forget that where we are now just did not happen, but has been the work of many, many people. Science, as it is practised, lives in the present, and its past is too often disregarded; nobody would want to be treated by a surgeon who worked using the knowledge of the 18th century. However, maybe a 22nd century patient would not want to be treated by a 21st century surgeon, who knows? This course has done an excellent job in setting out how, what could be called modern Science, began its passage to where we are today.