Research description: I am broadly interested in the phylogenetic relationships, adaptations, and historical biogeography of placental mammals. My research is now focused largely on fossil mammals from the Eocene and Oligocene of Africa. In particular, late Eocene faunas from Egypt which I am actively working on have provided important insights into the early evolution of anthropoid and strepsirrhine primates, and also document primitive relatives of living hyraxes, elephants, sengis, tenrecs, various bat and rodent clades, and entirely extinct clades such as Hyaenodonta and Ptolemaiida.