Now often also considered a distinct species, Homo neanderthalensis (otherwise known as Homo sapiens neanderthalensis) lived in the southern half of Poland during the Middle Paleolithic period, that is between 300,000 and 40,000 BCE. Various relics were found and different Neanderthal cultures are distinguished. Acheulean handaxes from Silesia dated 200,000-180,000 years ago are among the older tools. Gatherer-hunter sporadic groups of Neanderthals penetrated southern Poland also during the Eemian interglacial, 128,000-115,000 BCE. Examination of the Micoquien-Prądnik culture (East Micoquien complex) sites in the Prądnik River Valley north of Kraków and in Zwoleń near Radom from about 85,000 to 70,000 BCE (early phase of the Vistula River glaciation period) shows that some Neanderthals were skilled collective hunters, able to kill numerous large mammals characteristic of the cold Pleistocene climate and process the meat, skin and bones using specialized tools.