Geomagnetic Field Modulation of Prebiotic N-Carbamoylation

The search for extraterrestrial life requires rigorous criteria to distinguish between abiotic chemical networks and authentic biosignatures. The evolution of complex macromolecules from simple precursors is a pivotal event in the origin of life. Pathways such as the Strecker synthesis and cyanate polymerization reactions elucidate the availability of building blocks. The role of the geomagnetic field (GMF) in shaping prebiotic chemical evolution has mainly remained underexplored. Here, we investigate the GMF as a potential regulator of the urea-mediated N-carbamoylation of amino acids, a crucial thermodynamic pathway for the formation of prebiotic peptides.By simulating primordial planetary conditions, we systematically evaluated the reaction efficiency of all proteinogenic amino acids under GMF (~50 µT) and hypo-magnetic field (HMF,