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The Vanishing Mediator
https://www.sciencedaily.com/releases/2022/06/220601200021.htm?utm_source=feedburner&utm_medium=email
June 1, 2022
Source:
University of Freiburg
Summary:
Archaeologists have uncovered a 3400-year-old Mittani Empire-era city once located on the Tigris River. The settlement emerged from the waters of the Mosul reservoir early this year as water levels fell rapidly due to extreme drought in Iraq. The extensive city with a palace and several large buildings could be ancient Zakhiku -- believed to have been an important center in the Mittani Empire (ca. 1550-1350 BC).
FULL STORY
A team of German and Kurdish archaeologists have uncovered a 3400-year-old Mittani Empire-era city once located on the Tigris River. The settlement emerged from the waters of the Mosul reservoir early this year as water levels fell rapidly due to extreme drought in Iraq. The extensive city with a palace and several large buildings could be ancient Zakhiku -- believed to have been an important center in the Mittani Empire (ca. 1550-1350 BC).
Bronze Age city resurfaced due to drought
Iraq is one of the countries in the world most affected by climate change. The south of the country in particular has been suffering from extreme drought for months. To prevent crops from drying out, large amounts of water have been drawn down from the Mosul reservoir -- Iraq's most important water storage -- since December. This led to the reappearance of a Bronze Age city that had been submerged decades ago without any prior archaeological investigations. It is located at Kemune in the Kurdistan Region of Iraq.
This unforeseen event put archaeologists under sudden pressure to excavate and document at least parts of this large, important city as quickly as possible before it was resubmerged. The Kurdish archaeologist Dr. Hasan Ahmed Qasim, chairman of the Kurdistan Archaeology Organization, and the German archaeologists Jun.-Prof. Dr. Ivana Puljiz, University of Freiburg, and Prof. Dr. Peter Pfälzner, University of Tübingen, spontaneously decided to undertake joint rescue excavations at Kemune. These took place in January and February 2022 in collaboration with the Directorate of Antiquities and Heritage in Duhok (Kurdistan Region of Iraq).
Fritz Thyssen Foundation supported excavations
A team for the rescue excavations was put together within days. Funding for the work was obtained at short notice from the Fritz Thyssen Foundation through the University of Freiburg. The German-Kurdish archaeological team was under immense time pressure because it was not clear when the water in the reservoir would rise again.
Massive fortification, multi-storey storage building, industrial complex
Within a short time, the researchers succeeded in largely mapping the city. In addition to a palace, which had already been documented during a short campaign in 2018, several other large buildings were uncovered -- a massive fortification with wall and towers, a monumental, multi-storey storage building and an industrial complex. The extensive urban complex dates to the time of the Empire of Mittani (approx. 1550-1350 BC), which controlled large parts of northern Mesopotamia and Syria.
"The huge magazine building is of particular importance because enormous quantities of goods must have been stored in it, probably brought from all over the region," says Puljiz. Qasim concludes, "The excavation results show that the site was an important center in the Mittani Empire."
The research team was stunned by the well-preserved state of the walls -- sometimes to a height of several meters -- despite the fact that the walls are made of sun-dried mud bricks and were under water for more than 40 years. This good preservation is due to the fact that the city was destroyed in an earthquake around 1350 BC, during which the collapsing upper parts of the walls buried the buildings.
Ceramic vessels with over 100 cuneiform tablets
Of particular interest is the discovery of five ceramic vessels that contained an archive of over 100 cuneiform tablets. They date to the Middle Assyrian period, shortly after the earthquake disaster struck the city. Some clay tablets, which may be letters, are even still in their clay envelopes. The researchers hope this discovery will provide important information about the end of the Mittani-period city and the beginning of Assyrian rule in the region. "It is close to a miracle that cuneiform tablets made of unfired clay survived so many decades under water," Pfälzner says.
Conservation project to prevent damage by rising water
To avert further damage to the important site by the rising water, the excavated buildings were completely covered with tight-fitting plastic sheeting and covered with gravel fill as part of an extensive conservation project funded by the Gerda Henkel Foundation. This is intended to protect the walls of unbaked clay and any other finds still hidden in the ruins during times of flooding. The site is now once more completely submerged.
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Related Multimedia: Images of archaeological site of Kemune at bottom of page
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University of Freiburg. "A 3400-year-old city emerges from the Tigris River." ScienceDaily. ScienceDaily, 1 June 2022. <www.sciencedaily.com/releases/2022/06/220601200021.htm>.
https://www.sciencedaily.com/releases/2022/06/220602095115.htm?utm_source=feedburner&utm_medium=email
June 2, 2022
Lancaster University
Summary:
Scientists have created a 'time-crystal' a two-body system in an experiment that seems to bend the laws of physics. A 'two-level system' is a basic building block of a quantum computer. Time crystals could perhaps be used to build quantum devices that work at room temperature. Time crystals were long believed to be impossible because they are made from atoms in never-ending motion. The discovery shows that not only can time crystals be created, but they have potential to be turned into useful devices.
FULL STORY
Scientists have created the first "time-crystal" two-body system in an experiment that seems to bend the laws of physics.
It comes after the same team recently witnessed the first interaction of the new phase of matter.
Time crystals were long believed to be impossible because they are made from atoms in never-ending motion. The discovery, published in Nature Communications, shows that not only can time crystals be created, but they have potential to be turned into useful devices.
Time crystals are different from a standard crystal -- like metals or rocks -- which is composed of atoms arranged in a regularly repeating pattern in space.
First theorised in 2012 by Nobel Laureate Frank Wilczek and identified in 2016, time crystals exhibit the bizarre property of being in constant, repeating motion in time despite no external input. Their atoms are constantly oscillating, spinning, or moving first in one direction, and then the other.
EPSRC Fellow Dr Samuli Autti, lead author from Lancaster University's Department of Physics, explained: "Everybody knows that perpetual motion machines are impossible. However, in quantum physics perpetual motion is okay as long as we keep our eyes closed. By sneaking through this crack we can make time crystals."
"It turns out putting two of them together works beautifully, even if time crystals should not exist in the first place. And we already know they also exist at room temperature."
A "two-level system" is a basic building block of a quantum computer. Time crystals could be used to build quantum devices that work at room temperature.
An international team of researchers from Lancaster University, Royal Holloway London, Landau Institute, and Aalto University in Helsinki observed time crystals by using Helium-3 which is a rare isotope of helium with one missing neutron. The experiment was carried out in Aalto University.
They cooled superfluid helium-3 to about one ten thousandth of a degree from absolute zero (0.0001K or -273.15°C). The researchers created two time crystals inside the superfluid, and brought them to touch. The scientists then watched the two time crystals interacting as described by quantum physics.
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Materials provided by Lancaster University. Note: Content may be edited for style and length.
Journal Reference: S. Autti, P. J. Heikkinen, J. Nissinen, J. T. Mäkinen, G. E. Volovik, V. V. Zavyalov, V. B. Eltsov. Nonlinear two-level dynamics of quantum time crystals. Nature Communications, 2022; 13 (1) DOI: 10.1038/s41467-022-30783-w