Tanja Bosak is a Croatian-American experimental geobiologist who is currently an associate professor in the Earth, Atmosphere, and Planetary Science department at the Massachusetts Institute of Technology.
[6] She later focused on stromatolite genesis with Dianne Newman,[4] and in 2005 completed her PhD dissertation, entitled "Laboratory models of microbial biosignatures in carbonate rocks".
[8] Her research suggested distinct carbonate microstructures as indicators of stromatolite biogenicity[9] and that microbial processes influence the shape of calcite crystals precipitated under supersaturated conditions.
[12] Bosak's postdoctoral research with Richard Losick and Ann Pearson used organic geochemistry and genetics to understand microbial evolution and ancient Earth history.
[13] Derivative compounds of sporulenes are found in the rock record, and Bosak proposed that these molecules could be used as biomarkers of aerobic environments.
[19] With Min Sub Sim and Shuhei Ono, Bosak found that biological sulfate reduction can produce large stable isotope fractionations of sulfur, similar to those seen in the rock record of early Earth.