Lior uses data-driven, computational methods to answer key questions about our biosphere. She currently focuses on quantifying wildlife in the Anthropocene - the age of global, significant human impacts on climate and ecosystems. Most recently, Lior estimated the global biomass of all wild mammals, providing a first-of-its-kind comprehensive census that can serve as a benchmark for human impacts. She is now working on expanding this “snapshot” and estimating the change in wild mammal biomass over the past few centuries, as well as providing global estimates for other taxa, such as all birds.