The Iron Age is argued by scholars to have started around 1200 BCE after shortages of copper and tin led to the forging of stronger metals, iron and carbon, into steel.

As the age of exploration ensued, early contacts between European explorers and North American natives were more frequent and often fraught with exploitation, disease and death.

The 1,000-year-long Copper Age, wedged between the Neolithic and Bronze ages, was distinguished by the earliest uses of copper and gold for weapons, tools, jewelry, art and more.

The Byzantine Empire was Constantine I’s extension of the Roman Empire until its overzealous military exhausted resources and economic conditions weakened the political environment, leading to the fall of the Byzantine Empire.

Located 2,300 miles west of South America, Easter Island is the most remote inhabited island on earth and where the Rapa Nui people built 887 statues before mysteriously disappearing.

In response to tensions between China and global trade partners during the Age of Imperialism, China would go through a period of war, nationalism and rebellion in response to outside oppression.

Medieval Christianity was marred by the Crusades and beliefs in sacerdotalism, which gave priests unilateral power to extort peasants and nobles alike for high fees to buy passage into heaven.