Dr Darren Gröcke is the Director of the Stable Isotope Biogeochemistry Laboratory (SIBL) at Durham University. SIBL has state-of-the-art gas source isotope mass spectrometers that are used for the investigation of archaeological, geological, biological and environmental samples. Darren has worked on a diverse array of subjects from modern kangaroo bones, mammoth diets, black shale formation and plant fertilisation. Darren has written many publications on modern, archaeological and geological studies. Darren has over 25 years of isotope experience and over 160 peer-reviewed international publications. SIBL has helped train many PhD, MSc and undergraduate students in isotope geochemistry – many of them continuing an academic career or in environmental consultancy. Over the past four years Darren has become very interested in macroalgae with respect to biofuels, agriculture and environmental studies. He learnt very quickly that the latter has received very little attention in the UK, and hence Darren is now using nitrogen isotopes in macroalgae around the UK to identify coastal regions polluted with nitrogen loading. Recent work in SIBL has confirmed that nitrogen isotopes in macroalgae in the UK can be used to distinguish between polluted and non-polluted regions. Darren is very keen to explore many other environments, animals and plants with the use of stable isotopes.