Who invented sand clocks?

Sand clocks have an ancient history and their exact origin is uncertain. Early sand clocks, also known as sand glasses or hourglasses, were used by the ancient Greeks and Romans between the 6th and 3rd centuries BCE. However, the inventors or specific individuals responsible for their invention are not known.

Where is the burial place of raja cholan?

How did the Eastern Woodlands disappear?

Covid-19:the opening of the Grand Egyptian Museum postponed to 2021
In Cairo, the inauguration of the Grand Egyptian Museum (GEM) announced for autumn 2020, will have to wait a little longer. To wait, Egypt offers some virtual tours of sites, all the access links to which are given in this article. All you have to do is click. The Grand Egyptian Museum (GEM), near
The drop in solar activity protected Spanish ships
The minimum solar radiation in the 17th century had a surprising effect in the West Indies:the virtual disappearance of tropical cyclones, thus sparing Spanish ships. Between 1645 and 1715, when solar radiation was less, the number of shipwrecks in the Antilles decreased. Digital:This article is t
1021:the exact year the Vikings were in America
Obtaining a new dating has just determined when the earliest European presence dates back to the American continent, five centuries before Christopher Columbus. Studied for several years by the Norwegian explorer Helge Instad (1899-2001) and his wife, the archaeologist Anne Stine-Insgstad, a small
The three-tiered underground city of Nushabad, built by the Sassanian Persians 1,500 years ago
In the province of Isfahan, in the center of Iran, is the city of Nushabad (or Nooshabad), which some identify with one of the capitals of Chosroes I, one of the main kings of the Persian Sassanian dynasty who reigned between 531 and 579 AD, a contemporary of the Byzantine Justinian I (whom he fough