Solar system: Did you mean...?

A map of the Inca road system which included some 40,000 km of routes.

The underground channel of a qanat in the Turfan water system in the Turpan Depression of Xinjiang, China.

The Achaemenid Persian Empire functioned as well as it did because of the efficient bureaucracy established by its founder Cyrus the Great (r. c. 550-530 BCE) which was administered through the satrapy system. A Persian governor of a province...

Intercultural referral model used in Dino Stagno Hospital, Traiguen, Chile.

The gods and goddesses of Ancient Egypt were an integral part of the people's everyday lives for over 3,000 years. There were over 2,000 deities in the Egyptian pantheon, many whose names are well known - Isis, Osiris, Horus, Amun, Ra, Hathor...

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...

In recent years, a persistent criticism has been leveled against the use of the BCE/CE system (Before the Common or Current Era/Common or Current Era) , rather than BC/AD (Before Christ/Anno Domini or 'Year of Our Lord'), in dating historical...

Construction of the Dujiangyan irrigation system began in the 3rd century B.C. This system still controls the waters of the Minjiang River and distributes it to the fertile farmland of the Chengdu plains. Mount Qingcheng was the birthplace...

View full lesson: https://ed.ted.com/lessons/how-the-world-s-first-subway-system-was-built-christian-wolmar It was the dawn of 1863 CE, and London's not-yet-opened subway system — the first of its kind in the world — had the city in an...

Historians and experts examine the American system of racialized slavery and the hypocrisy it relied on to function.