Degree in Geology (1987) and PhD in Paleontology (1991). I work on Plio-Pleistocene large mammals and participate at different projects in Plio-Pleistocene sites around the World, been the co-leader of the Baza and Incarcal projects (Spain), and the Oued Sarrat (Tunisia) and Engel Ela-Ramud Basin (Eritrea) projects, but I participate too in the research of Buia (Eritrea), Melka Wakena (Ethiopia), Atbara River (Sudan), `Ubeidiya, Gesher Benot Ya'aqov, and Bizat Ruhama (Israel), Dmanisi (Georgia), Argentario and Pirro Nord (Italy), and Vallonnet (France).
I am a paleontologist working on Quaternary mammals from Europe, Asia and Africa. My main interest is to describe the ecological scenario where our ancestors, the earlier members of the genus Homo, evolving and dispersing from Africa, were able to colonize the middle latitudes of Eurasia and survive in seasonal climates during the Pleistocene times. I have developed an intense research travelling around the world to study the African origin mammals dispersing into Eurasia, and the Eurasian origin mammals dispersing into Africa, in order to describe their systematics, phylogeny, biochronology, paleobiogeography, autoecology, and their potential ecological relationships among them and with hominins. I work on fossil hyenas, sabertoothed tigers, hunting dogs, bears, elephants and mastodonts, hippos, pigs, buffaloes, antelopes, deers, giraffes, camels, monkeys and other groups.