Solar system: Did you mean...?

The Shushtar Hydraulic System is a Sasanian era (3rd century CE) water irrigation system in Shushtar in Iran that included watermills, dams, tunnels and canals. The mills, one of which is still functioning, were used...

The entrance to the water system at Tel Gezer in central Israel. This photo was taken during the 2011 excavations of the water system by the New Orleans Baptist Theological Seminary. The water system is believed...

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

A photograph of part of the tunnel network of the Maginot Line, the defensive system built along France's eastern frontiers prior to the Second World War (1939-45). From the Schoenenbourg fort, Bas-Rhin, France.

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.

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...

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...

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...

The rapidly expanding 19th-century rail network not only 'annihilated space,' in the parlance of the day, but also altered the definition, use, and perception of time. Moreover, like much else...