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Early Neolithic salt production, dating to approximately 6,000 BCE, has been identified at an excavation in Poiana Slatinei-Lunca, Romania. [6]Solnitsata, the earliest known town in Europe, was built around a salt production facility.
What is now thought to have been the first city in Europe is Solnitsata, in Bulgaria, which was a salt mine, providing the area now known as the Balkans with salt since 5400 BC. [10] Salt was the best-known food preservative, especially for meat, for many thousands of years. [ 11 ]
Besides "Montepellusanus", [4] during the thirteenth century (and beyond) the only supply of saltpeter across Christian Europe (according to "De Alchimia" in 3 manuscripts of Michael Scot, 1180–1236) was "found in Spain in Aragonia in a certain mountain near the sea", (which can only be Catalonia): saraceni apellant ipsum borax et credunt quod sit alumen.
Map: Old Salt Route. The Old Salt Route was a medieval trade route in Northern Germany, one of the ancient network of salt roads which were used primarily for the transport of salt and other staples. In Germany it was referred to as Alte Salzstraße. Salt was very valuable and essential at that time; it was sometimes referred to as "white gold."
The Museum Route is famous for its unique on the European scale collection of the horse mills, exhibition of salt crystals and monumental chambers such as Maria Teresa and Saurau Chamber. The Museum Route is located entirely on the 3 level of the mine and it takes around 50 minutes to go through the 1.5 kilometres long trail.
The salt highways of Europe were the navigable rivers, where by medieval times shipments of salt coming upstream passed rafts and log-trains of timber, which could only be shipped downstream. [7] And even along Europe's coasts, once long-distance trade was revived in the 11th century, the hot and sunny south naturally outproduced the wet north.
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1974: The lithium-ion battery is invented by M. Stanley Whittingham, and further developed in the 1980s and 1990s by John B. Goodenough, Rachid Yazami and Akira Yoshino. It has impacted modern consumer electronics and electric vehicles. [509] 1974: The Rubik's cube is invented by Ernő Rubik which went on to be the best selling puzzle ever. [510]