Period 1: From Hunting and Gathering to Civilizations (2h 43min, jan 1, 2500000 y BC – 6h 43min, jan 2, 1000 y BC)
Added to timeline:
Date:
2h 43min, jan 1, 2500000 y BC
6h 43min, jan 2, 1000 y BC
~ 2500660 years