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Darius I (l. c. 550-486 BCE, r. 522-486 BCE), also known as Darius the Great, was the third Persian King of the Achaemenid Empire. His reign lasted 36 years, from 522 to 486 BCE; during this time the Persian Empire reached its peak. Darius...

Ancient Greek astronomy was the study of the universe to understand how it functioned and why apart from the established theistic model that claimed all things were ordered and maintained by the gods. Ancient Greek astronomers relied on observation...

The First Agricultural Revolution, beginning c. 12-20,000 years ago, was characterized by the emergence of different agricultural systems in different parts of the world, whose common trait was the use of native species. Although agriculture...

Hephaestion was a member of Alexander the Great's personal bodyguard and the Macedonian king's closest and lifelong friend and advisor. So much so, Hephaestion's death would bring the young king to tears. From 334 to 323 BCE Alexander the...

Emperor Harshavardhana, better known as Harsha, lived from 590 to 647 CE and was the last ruler of the Vardhana Empire, the last great empire in ancient India before the Islamic Invasion. He ruled from 606 CE to 647 CE. After Harshavardhana's...

Writing is the physical manifestation of a spoken language. It is thought that human beings developed language c. 35,000 BCE as evidenced by cave paintings from the period of the Cro-Magnon Man (c. 50,000-30,000 BCE) which appear to express...

A map illustrating the earliest stages of human civilization spanning from c. 8000 BCE to 2000 BCE. It showcases the emergence of organized societies, agricultural practices, and the origins of urbanization.

An extract from The Vedas (or Rig-Veda) written in Sanskrit (early 19th century CE).

The estimated expanse of the Achaemenid Empire at its height c. 500 BCE was two million square miles. Most of this territory was conquered by Cyrus the Great, the founder of the Empire, who reigned from 559 to 530 BCE, the fourth king in...