Throughout our history, most civilizations have either met a slow demise or were wiped out by natural disasters or invasion. But there are a few societies whose disappearance has scholars truly stumped: 10. The Olmec One of the first Mesoamerican societies, the Olmec inhabited the tropical lowlands of south-central Mexico. The first signs of the Olmec are around 1400 BC in the city of San Lorenzo, the main Olmec settlement which was supported by two other centers, Tenochtitlan and Potrero Nuevo.
Ancient Greece 16 animated historical maps Antiquity – The Greek world - Mycenaeans - colonization – the Hellenistic kingdoms – a city-state: Athens – Athenian democracy - the Pan-Hellenic sanctuaries – Alexandria, a Hellenistic city – the Greco-Persian wars - Marathon - Salamina – The Peloponnesian war – the Athenian Empire – the conquests of Alexander the Great
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