Four World ZonesKhan Academy. For a brief period, from about 10,000 years ago to about 500 years ago, the rising seas at the end of the last ice age divided the world into four non-connected geographic zones. Isolated from one another, four groups of people developed distinct lifeways and conducted their own experiments in human culture."
Credo Reference helps you start your research in ancient history with overviews of the culture, philosophy, events, and famous figures of the classical world and beyond.
