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Eduard Simon, a German apothecary, discovers polystyrene. [2] 1844. Thomas Hancock patents the vulcanization of rubber in Britain immediately followed by Charles Goodyear in United States. [3] 1856. Parkesine, the first member of the Celluloid class of compounds and considered the first man-made plastic, is patented by Alexander Parkes. [4] 1869.
c.5500 – c. 1800 BC. Preceded by. Ubaid period. Followed by. Akkadian Empire. Sumer (/ ˈsuːmər /) is the earliest known civilization, located in the historical region of southern Mesopotamia (now south-central Iraq), emerging during the Chalcolithic and early Bronze Ages between the sixth and fifth millennium BC.
The history of Sumer spans the 5th to 3rd millennia BCE in southern Mesopotamia, and is taken to include the prehistoric Ubaid and Uruk periods. Sumer was the region's earliest known civilization and ended with the downfall of the Third Dynasty of Ur around 2004 BCE. It was followed by a transitional period of Amorite states before the rise of ...
Explore the universe with news on fascinating discoveries, scientific advancements and more. Microplastics have been found in historic soil samples for the first time, according to a new study ...
Economy of Sumer. The Sumerian economy refers to the systems of trade in ancient Mesopotamia. Sumerian city-states relied on trade due to a lack of certain materials, which had to be brought in from other regions. Their trade networks extended to places such as Oman, Arabia, Anatolia, the Indus River Valley, and the Iranian Plateau.
The Sumerians were firmly established in Mesopotamia by the middle of the 4th millennium BC, in the archaeological Uruk period, although scholars dispute when they arrived. [44] It is hard to tell where the Sumerians might have come from because the Sumerian language is a language isolate , unrelated to any other known language.
60 minutes. Original release. Network. BBC Two. Release. February 2005. (2005-02) What the Ancients Did for Us is a 2005 BBC documentary series presented by Adam Hart-Davis that examines the impact of ancient civilizations on modern society.
The architecture of Mesopotamia is ancient architecture of the region of the Tigris – Euphrates river system (also known as Mesopotamia), encompassing several distinct cultures and spanning a period from the 10th millennium BC (when the first permanent structures were built) to the 6th century BC. Among the Mesopotamian architectural ...