Extreme environments / astrobiology

Acidic hypersaline environments: acid salt lakes hold uniquely challenging limits for microbial life, and have been proposed as Martian analogs. We have characterised the diversity of halophilic acid-tolerant microbial communities in SE Australia.

Criteria for biogenicity in microfossils: investigations of putative microbial microfossils require solid understanding of the physical structure and chemistry of bona fide microfossils as baseline criteria for determining biogenicity. We studied the ultrastructure and chemical composition of microfossils from a 1.9 Gyr old iron formation.

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