the physiology of plants and algae, and petroleum and mineral geochemistry. Of particular importance was pinpointing sulfide toxicity as an underlying cause of rapid biological turnover, by identifying the frequency of green sulfur bacteria (GSB) remains in mass extinction sedimentary records. More recently, she identified the key role of microbial communities in exceptional fossil preservation, with increased access and utilization of this new biological fossil record. Major scientific breakthroughs have shed light on global anoxic events and their association with mass extinctions. Grice's PhD research on the stable carbon isotopic compositions of maleimides in sedimentary organic matter from the Permian Kupferschiefer underpinned some of her latter breakthroughs (e.g., relationship between GSB, sulfide toxicity and highly dynamic environmental/biological systems). Chlorobi utilise during photosynthesis to fix , giving a 13C enrichment of lipids that renders them distinct from the lipids of other algae [84, 86]. She has additionally discovered an array of diagenetic products from the carotenoids made by Chlorobi. At Curtin University Grice has built the Western Australian Organic & Isotope Geochemistry Centre (WA-OIGC) into one of the largest organic geochemical laboratories in the southern hemisphere, with research infrastructure primarily funded by 15 ARC infrastructure grants. This includes four compound specific isotope and bulk isotope analysis facilities (C, H, N and S) available for organic analytes and a 2018 ARC grant ($1.276M) for a Time-of-Flight Secondary Ion Mass Spectrometer (TOF-SIMS). Other analytical instrumentation in the WA-OIGC laboratories include gas chromatography-mass spectrometry (GC-MS) equipped with a range of sample introduction methods (liquid injection, SPME, gas analysis, on-line pyrolysis devices, thermal desorption unit) and two-dimensional GC (GC×GC-TOFMS) for complex organic mixtures. Heavy polar molecules, such as intact lipids and metalloporphyrins, are analysed by Orbitrap liquid chromatography-mass spectrometry (LC-MS). Grice collaborated with colleagues at UWA (Malcolm McCulloch FAA, FRS and Paul Greenwood) to build the world's second dedicated sulfur-CSIA facility (GC-ICPMS), which measures δ34S of organosulfur compounds. WA-OIGC now also includes a state-of-the-art paleogenomics laboratory, established by Deputy Director Marco Coolen in 2015, capable of nucleic acid extraction from trace biomass of ancient environments. The excellent ancillary facilities at WA-OIGC include core drilling equipment, sample preparation and storage, traditional wet chemistry methods for extraction, chemical cleavage, separation and derivatisation, and more novel techniques including hydropyrolysis for soft thermal fragmentation of macromolecules. The WA-OIGC facilities have led to many national and international partnerships with universities, government and industry. WA-OIGC is also a major member of