jasminawiemann

Name: jasminawiemann - AI Visibility Score
Creator: Engagemii
Published: 2026-07-01T00:03:27.509Z
License: https://creativecommons.org/licenses/by/4.0/

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AEO Score: 5/10

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About jasminawiemann

Lab homepage for Jasmina Wiemann's PaLEO Lab (Molecular Geo-, Astro-, Paleobiology) at Johns Hopkins University.

Key Topics

Evolving

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Image credits: Arkive, O. Sanisidro, Mark Garlick/Science Photo Library, Davide Bonadonna/National Geographic, Christian Jegou/Science Photo Library

National Geographic

We use extraterrestrial insoluble organic matter imported by carbonaceous meteorites (from Mars, the asteroid belt, and other solar system bodies) as an abiogenic comparison for modern and fossil biogenic organic matter. Statistical analyses of compositional data allow us to define the molecular fingerprint shared by all Life as we know it, and reveal compositional features (apomorphies) that are diagnostic of organismal complexity (ranging from prebiotic mixtures to the first cellular structures preserved in the fossil record on Earth). We combine techniques allowing for molecular characterization with in situ observed experimental pressure- and temperature-alteration and theoretical models based on physical variables, to elucidate the origin(s), diversity, and evolution of the earliest Life on Earth and elsewhere in the solar system.

Our group explores the foundational mechanisms of templated biomineralization across modern prokaryote and eukaryote systems to reveal how different protein features translate into mineralogies. For modern biominerals, we integrate data on the proteomic make-up, molecular structures, and spatially resolved post-translational modifications in the context of organo-mineral interactions. We experimentally model the pressure- and temperature-alteration (relevant for fossilization processes) of biominerals, and refine our proxies to allow for the integration of data for modern and fossil samples. We leverage these insights to unravel [1] the evolutionary mechanisms involved in the independent emergence of biominerals and [2] their clade-specific adaptation potential to long-term climatic and ecological perturbations, with a special emphasis on marine calcifiers involved in carbon fixation. Our group translates this information into bio-inspired climate solutions.