The Middle Ages or Medieval period is a stretch of European history that lasted from the 5th until the 15th centuries
The Paleolithic Age, Era or Period is a prehistoric period of human history distinguished by the development of the most privitive os stone tools.
The Neolithic Era, or period, from or New Stone Age, was a period in the development of human technology.
The Vikings were seafaring northern Germanic people who raided, traded, explored, and settled in wide areas of Europe, Asia, and the North Atlantic islands from the late 8th to the mid-11th centuries
Chinese civilization originated in various regional centers along both the Yellow River and the Yangtze River valleys in the Neolithic era, but the Yellow River is said to be the cradle of Chinese civilization.
Ancient Egypt was an ancient civilization of Northeastern Africa, concentrated along the lower reaches of the Nile River in what is now the modern country of Egypt.
Ancient Greece was a Greek civilization belonging to a period of Greek history that lasted from the Archaic period of the 8th to 6th centuries BC to the end of antiquity