For folks interested in interdisciplinary PhD or postdoc opportunities - catch me on Sunday or Monday, I look forward to meeting you!

This talk touches only on one out of many topical foci in my lab at Hopkins - curious? Here's our lab homepage:
www.jasminawiemann.com

Many thanks, Matt!

Now you know where to look for your cholestane signals in your fossils!
#paleontology #astrobiology #geochemistry

Find the paper in @Geobiology:
onlinelibrary.wiley.com/doi/10.1111/...

This preservational bias held up when we analyzed a large fossil sample via #Raman spectroscopy [note the *beautiful* CH2-scissoring diagnostic for cholestane in raw spectra and the 2-D spectral correlation plot!]. Check out the spectacular ToF SIMS maps for direct comparisons!

#Biomarkers do not preserve uniformly well across the diverse diagenetic minerals found in #fossils - cholestane, one of the most widely used informative biomarker preserves exceptionally well in diagenetic carbonates rather than phosphates.

If you're around, check out our fancy new data, and learn more about how we use our state-of-the-art AFM-Raman platform to rethink #biosignatures here at Hopkins!

Let's chat about how our methods could help answer your evolutionary questions! [2/2]

Here starts our odyssey to illuminate the fingerprint, origin(s), evolution, and evolvability of Life on Earth and elsewhere in the Universe ... one photon at a time!

For folks currently exploring postdoc opportunities for 2026: if you are looking for a collaborative and interdisciplinary environment to explore ambitious, big-picture questions through time, space, and the tree of life, feel free to reach out, let's chat about fellowships!

Pjotr will bring his cutting-edge approach to single-cell vibrational spectroscopy to Hopkins, tailored to the development of time-integrated biosignatures. He is planning to grow his comprehensive spectral database to explore new molecular applications to enigmatic microfossils and astrobiology.

Mariana will pioneer the integration of molecular, histological, and morphological approaches to the amniote metabolism. She is planning to apply her multiproxy approach to trace ontogenetic trade-offs in the light of extinction susceptibility.