The Revolutions of 1989 brought an end to both Soviet hegemony and communism in Eastern Europe. Germany was reunited, Europe's integration deepened, and both NATO and the EU expanded to the east. The EU came under increasing pressure because of the worldwide recession after 2008. "Homo erectus" migrated from Africa to Europe before the emergence of modern humans. "Homo erectus georgicus", which lived roughly 1.8 million years ago in Georgia, is the earliest hominid to have been discovered in Europe. Lézignan-la-Cèbe in France, Orce in Spain, Monte Poggiolo in Italy and Kozarnika in Bulgaria are among the oldest Palaeolithic sites in Europe. The earliest appearance of anatomically modern people in Europe has been dated to 35,000 BC, usually referred to as the Cro-Magnon. The earliest sites in Europe are Riparo Mochi (Italy), Geissenklösterle (Germany), and Isturitz (France). Some locally developed transitional cultures (Uluzzian in Italy and Greece, Altmühlian in Germany, Szeletian in Central Europe and Châtelperronian in the southwest) use clearly Upper Palaeolithic technologies at very early dates. Nevertheless, the definitive advance of these technologies is made by the Aurignacian culture. The origins of this culture can be located in the Levant (Ahmarian) and Hungary (first full Aurignacian). By 35,000 BC, the Aurignacian culture and its technology had extended through most of Europe. The last Neanderthals seem to have been forced to retreat during this process to the southern half of the Iberian Peninsula. Around 29,000 BC a new technology/culture appeared in the western region of Europe: the Gravettian. This technology/culture has been theorised to have come with migrations of people from the Balkans (see Kozarnika). Around 16,000 BC, Europe witnessed the appearance of a new culture, known as Magdalenian, possibly rooted in the old Gravettian. This culture soon superseded the Solutrean area and the Gravettian of mainly France, Spain, Germany, Italy, Poland, Portugal and Ukraine. The Hamburg culture prevailed in Northern Europe in the 14th and the 13th millennium BC as the Creswellian (also termed the British Late Magdalenian) did shortly after in the British Islands. Around 12,500 BC, the Würm glaciation ended.