Saitta, E. T., Vinther, J., Crisp, M. K., Abbott, G. D., Wheeler, L., Presslee, S., …Penkman, K. E. (2024). Non-avian dinosaur eggshell calcite can contain ancient, endogenous amino acids. Geochimica et Cosmochimica Acta, 365, 1-20. https://doi.org/10.1016/j.gca.2023.11.016