People

I am a scientist interested in the co-evolution of life and planetary environments across very large spans of space and time. I focus on the study of biosignatures in ancient materials relevant to the early Earth, Mars, and beyond. My work has discovered new traces of life in Earth's deep subsurface, new evidence of geochemical and biological processes relevant to early Earth and Mars, new forms of "false biosignature" that could mislead astrobiologists, and various new varieties and interpretations of fossils. I am Programme Director for Edinburgh's MSc in Astrobiology and Planetary Sciences, the first programme of its kind in the UK.

Member/Fellow: Higher Education Academy (FHEA),  Royal Astronomical Society (FRAS), Geological Society of London (FGS, Palaeontological Association, Astrobiology Society of Britain, Council for the Defence of British Universities (Deputy Chair). Associate Editor of the International Journal of Astrobiology (Cambridge University Press). STEM Ambassador.

Background: I studied at Oxford (MEarthSci, St Edmund Hall), Aberdeen (PhD Geology), Birkbeck  (BA Philosophy) and Edinburgh (PgCert Academic Practice). Other than Edinburgh I have worked at Yale University, Durham University (briefly), and NASA Ames (as an intern).

Corentin Loron (BSc Lille 1, MSc Uppsala-Lille-1, PhD Liège) is investigating the oldest fossil fungi and their pathways of fossilization.

Pam Knoll (BS, PhD Florida State) is a physical chemist investigating biomineral selection by extremophile microorganisms.

Mia (BA Harvard) is investigating the astrobiology of simulated exoplanet reflectance spectra. By merging the two seemingly distant fields of exoplanetary astronomy and laboratory microbiology, this research will provide a unique perspective of life on exoplanets and contribute to developing next-generation space-based instruments.

Susie (BSc University of York) is investigating the fossilization of bacteria under extreme conditions.

Lead supervisor: Anna Neubeck

Sigrid (BSc Pavia, MSc Uppsala) is researching the biogeochemistry of manganese and the production of self-organized pseudofossils on early Earth and Mars.

Lead supervisor: Alex Liu

Phil is an experimental palaeobiologist interested in the preservation of Ediacaran soft-bodied macrofossils.

Lead supervisor: Peter Vickers

Cat Gillen (BSc Durham, MA LMU) is a philosopher of science working on biosignature uncertainty in astrobiology.

Melanie (BS Appalachian State University) investigated the fossilization of iron-oxidizing bacteria and compared them with iron-mineralized pseudofossils produced in the laboratory.

She then moved to NASA's Space Life Sciences Lab at the Kennedy Space Center for further research in space biology. Her project there investigated how microgravity impacts the immune response of plants in preparation for a flight experiment onboard the International Space Station. This work was part of a collaboration between NASA and the University of Florida.

In 2023 Melanie returned to Edinburgh to begin a PhD investigating the potential of sulfate reducing bacteria for the production of metal nanoparticles (Ni and potentially Pd and Pt nanoparticles too). This process could be used to remove contamination from lithium ion battery leachates and make battery recycling more sustainable, and may have applications for in situ resource utilization and biomining in space.

Elisha completed an MPhys research project entitled, "Hydrodynamic Forcing of Stromatolite Morphology" based on numerical modeling of the growth of organosedimentary structures. Elisha is now a PhD student at the University of Sheffield.

Sam completed a Senior Honours Project entitled, "Numerical approaches to self-organization in agates" based on the numerical modeling of diffusive and layered growth structures in agates. Sam then moved to Gonville and Caius College, Cambridge to complete the MASt in Applied Mathematics (Part III of the Mathematical Tripos), before beginning doctoral work at the University of Oxford.

Violet is researching the possible existence of squirrels in that tree. She is not allowed in the laboratories.