Caste System: Did you mean...?

Earth's solar system by NASA and Rawpixel.

An illustration of the solar system by Martin Kornmesser. From The International Astronomical Union.

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

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

Chandragupta Maurya (c. 321 - c. 297 BCE), known as Sandrakottos (or Sandrokottos) to the Greeks, was the founder of the Maurya Dynasty (4th-2nd century BCE) and is credited with the setting up of the first (nearly) pan-Indian empire. Aided...

The Arthashastra is an Indian treatise on politics, economics, military strategy, the function of the state, and social organization attributed to the philosopher and Prime Minister Kautilya (also known as Chanakya, Vishnugupta, l. c. 350-275...

Vardhamana (l. c. 599-527 BCE), better known as Mahavira (“Great Hero”) is the sage credited with founding of the nontheistic religion of Jainism, a belief system established in the 6th and 5th centuries BCE in India, which provided adherents...

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...