Solar system: Did you mean...?

After twenty years of abandonment, and even forty in the case of the branch of La Hijuela, the traditional irrigation system of Barjas was rehabilitated in collaboration with the National and Natural Park of Sierra Nevada, and CEAMA. This...

In this video, the various classes within Roman society, as well as the Conflict of the Orders are discussed.

The Celtic languages form a branch of the Indo-European (IE) language family. They derive from Proto-Celtic and are divided into Continental Celtic languages (Lepontic, Gaulish, Galatian, Noric, Celtiberian, Gallaecian) and Insular Celtic...

The Longshan culture (aka Lung-shan) flourished in parts of late Neolithic northeast China during the third millennium BCE and was an important link in the development of Chinese civilisation from the independent neolithic communities to...

Feudalism was the system in 10th-13th century European medieval societies where a social hierarchy was established based on local administrative control and the distribution of land into units (fiefs). A landowner (lord) gave a fief, along...

Western astrology refers to a form of divination based on the motion of astronomical objects such as stars or planets. The belief that astronomical objects are divine or influence events on Earth is found in many cultures, but the practices...

The encomienda was a system where Spanish adventurers and settlers were granted the legal right to extract forced labour from indigenous tribal chiefs in the Americas colonies of the Spanish Empire. In return, the Europeans were expected...

The Silla kingdom ruled south-eastern Korea during the Three Kingdoms period from the 1st century BCE to 7th century CE. The capital was Geumseong (Gyeongju) with a centralised government and hierarchical system of social ranks. The prosperity...

Archelaus of Athens (l. c. 5th century BCE) was a Pre-Socratic philosopher in ancient Greece who claimed the first cause of existence was the opposition of cold and heat which caused the separation of the universal essence to produce a plurality...

The civil service examinations of Imperial China allowed the state to find the best candidates to staff the vast bureaucracy that governed China from the Han Dynasty onwards (206 BCE - 220 CE). The exams were a means for a young male of any...