Unibertsoren jatorria By mariaangelicaurzayalvarez 2500 Oraina 2500 Oraina 5000 Lurra / Egukia 5000 Lurra / Eguskia 7500 Esne bidea 7500 Esne bidea Period: 12,500 to 10,000 izarra Period: 12,500 to 1000 Izarra 15,000 Big banga 15,000 big banga