Brink is a vertebrate paleontologist interested in the evolution and development of teeth and bones, specifically tissue structure and growth rates, and the relationship between development, structure, growth, and animal ecology. Her research involves the use of living animal models to understand how extinct animals grew and interacted with their environment, including dinosaurs, lizards, and mammalian ancestors. She uses histology, microscopy, Computed Tomography (CT scans), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM) to address her research questions.