Does history count?

The Census of Marine Life is an international and inter-disciplinary collaboration that seeks to map ocean life of the past, present and future. From the Arctic to the abyssal zones, it is producing a stream of newsworthy science, literally pushing the study of biodiversity to new depths. This fascinating and far-reaching endeavour offers a rich set of insights that can illuminate our changing ideas about the oceans. But one section of the Census deserves special attention - the History of Marine Animal Populations. It provides a unique focus for debates about collaboration and big science, about historical methods and about the study of current science by historians of science.