Russell began his career at Birmingham as a research fellow intent on working on corals in the geological record, when he made a chance discovery of fossil beetle remains in an organic layer recovered from the Chelford sand quarry in Cheshire. His senior colleague was Professor Fred Shotton FRS, who reportedly said "don't be silly, Russell, they are modern ones that have just crawled in there to die!". His first paper was on these finds in the Proceedings of the Royal Society in 1959, followed by famous discoveries at Upton Warren in Worcestershire. The faunas in deposits of different ages amazingly contained beetles from both warm periods (with modern southern European species) and cold periods (found today only in Siberia!). And so, assisted for some years by Museum curator Peter Osborne, and in the context of the department's radiocarbon dating laboratory, he set about his life's work with great vigour, famously demonstrating extraodinarily rapid rises in temperature in the late glacial period, a conclusion reinvented much later by the famous Greenland ice core records.