While the rest of Europe was cooling, the area around Gibraltar back then resembled a European Serengeti. Leopards, hyenas, lynxes, wolves and bears lived among wild cattle, horses, deer, ibexes, oryxes and rhinos – all surrounded by olive trees and stone pines, with partridges and ducks overhead, tortoises in the underbrush and mussels, limpets and other shellfish in the waters. Clive Finlayson, evolutionary biologist at the Gibraltar Museum said "this natural richness of wildlife and plants in the nearby sandy plains, woodlands, shrublands, wetlands, cliffs and coastline probably helped the Neanderthals to persist." Evidence at the cave shows the Neanderthals of Gibraltar likely used it as a shelter "for 100,000 years." Cro-Magnon man took over Gibraltar around 24,000 BCE.