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Intergalactic experiment: Researchers hunt for mysterious dark matter particle with clever new trickPhysicists from the University of Copenhagen have begun using the gigantic magnetic fields of galaxy clusters to observe distant black holes in their search for an elusive particle that has stumped scientists for decades.
The reliable engineering of quantum states, particularly those involving several particles, is central to the development of various quantum technologies, including quantum computers, sensors and communication systems. These collective quantum states include so-called Dicke and Greenberger-Horne-Zeilinger (GHZ) states, multipartite entangled states that can be leveraged to collect precise measurements, to correct errors made by quantum computers and to enable communication between remote devices leveraging quantum mechanical effects.
![]() The ancient Sumerian cylinder seals are considered without a doubt some of the most interesting objects ever recovered from Ancient Mesopotamia. A cylindrical seal is a small object decorated with images, words, or in some cases both, engraved on its surface in an intricate way. A cylindrical seal is a small object decorated with images, words, or in some cases both, engraved on its surface in an intricate way. Cylinder seals are important to scholars since they often tell a story about a specific timeline and civilization. The ancient Sumerian cylinder seals have left a true mark on history. Ancient Sumerian cylindrical seals were applied by rolling them onto fresh clay, which left behind the impression. When the clay dried, the image was reflected on its surface. These stamps were used in ancient Sumer for a variety of purposes, including commercial transactions, decoration, and correspondence. The Cylinder seal was considered as an extremely important part of daily life in Ancient Mesopotamia. ![]() Cylinder seals were known as kishib in Sumerian and kunukku in Akkadian and were used by everyone, from royals to slaves. The seals were made by a ‘sealcutter’ known as a burgul in Sumerian and as a purkullu in the Akkadian language The images left behind by the seals on clay surfaces were quite complex and beautiful. Cylindrical seals were used by cultures from the ancient Near East, including the Sumerians, Akkadians, Hittites, and Persians. According to experts, these intricate objects originated in the Late Neolithic Period, sometime around 7600-6000 BCE, in modern day Syria. There are some scholars who argue that cylinder seals originated in Sumer, modern day Iraq. The Sumerian cylindrical seals were usually created of stones (sometimes semiprecious stones) of different types. The ancients utilized amethyst, obsidian, hematite among other elements. However, experts note that other materials such as glass, ceramics, gold, silver, wood, bone and ivory were also used in ancient times to produce these objects. Apart of being considered symbols of status and amulets, ancient Sumerian cylindrical seals also had other practical uses. ![]() They were used to sign documents written on clay tablets. By using a stamp to make an impression on the surface of a fresh clay tablet, an individual could certify that the document was genuine. This need to authenticate the documents occurred with the increase of bureaucracy that took place in Mesopotamia, especially in the southern parts, where it was more complex, throughout the IV millennium BC. In business and commerce, cylindrical seals were used to certify that stored goods were not tampered with or stolen. In this way, we find impressions made by cylindrical seals on clay used to seal storage jars and on doors of warehouses in ancient Sumer. The design of the Sumerian cylindrical seals has always aroused great interest among experts, mostly because of the intricate carvings covering very diverse subjects. As noted by experts, the motifs were usually focused on three main motifs: combat, banquets and religious themes. On their surface, we can see deities, human beings, plants, animals and religious iconography. Among other designs that can be observed on the cylindrical seals are geometric patterns and inscriptions in cuneiform script. As noted by Ancient.eu, there are two styles of cylinder seal: the Uruk-style and the Jemdet Nasr-style which refer to the motifs used and the way the seals were carved. Authors Megan Lewis & Marian Feldman comment on this, writing:
If we take a look at the archaeological record we will find that archaeologists have discovered as many cylindrical seals as clay tablets on which they were printed. There are numerous cylindrical seals in museums around the world. The Baghdad Museum, for example, has a collection of 7,000 cylindrical seals, although most of them were looted when Baghdad fell into the hands of US troops in 2003. These valuable archeological pieces have not yet been recovered. Reference: Cylinder Seals in Ancient Mesopotamia – Their History and Significance When the Crew-11 astronauts launched to the International Space Station on August 1, 2025, they carried with them another chapter in space farming: the latest VEG-03 experiments, complete with seed pillows ready for planting.
EIRSAT-1, Ireland’s first satellite, has successfully tested an advanced onboard control system that allows it to orient itself accurately in space. The breakthrough was achieved using a payload called Wave-Based Control (WBC), a software platform designed by a team at UCD School of Mechanical and Materials Engineering to test new satellite maneuvering techniques while in orbit.
Six planets are hanging out in the sky this month in what’s known as a planetary parade. Catch the spectacle while you can because it’s the last one of the year.
Rising concentrations of carbon dioxide in the upper atmosphere will change the way geomagnetic storms impact Earth, with potential implications for thousands of orbiting satellites, according to new research led by scientists at the U.S. National Science Foundation National Center for Atmospheric Research (NSF NCAR).
Mars still holds the promise of being one of the first places in the solar system humanity will colonize. However, if there was evolutionarily distinct, extant life on the planet, it might sway the heart of even the most ardent Mars colonization fans. So astrobiologists are in a race against time to try to determine whether or not such life exists, before the entire planet becomes an analog of Earth’s biosphere, if only unintentionally, and only a shadow of the ones that exist here.
In everyday life, continuously doing work on a system is found to heat it up. Rubbing your hands together warms them. Hammering a piece of metal makes it hot. Even without knowing the equations, we learn from experience: driving any system, whether by stirring, pressing, or striking, leads to a rise in the system’s temperature.
The West Memphis Police Department cited sexual misconduct allegations and prior complaints as key factors in the decision
The ability to move electron-hole pairs—called excitons—in desired directions is important for generating electricity and creating fuels. This happens naturally in photosynthesis, making it a source of inspiration to researchers innovating optoelectronic devices.
Researchers have developed a novel way for liquid crystals to retain information about their movement. Using this method could advance technologies like memory devices and sensors, as well as pave the way to future soft materials that are both smart and flexible.
Trooper First Class Dennis D. Ricks was hit by a box truck while conducting a stop on I-26
Bodycam footage shows the Kentucky man attempting to flee after kicking a Pinellas County deputy while being separated from a fight
In the not-too-distant future, the search for signs of life on Mars and the moon could see the next generation of robots exploring a new frontier: subsurface lava tubes. These missions could also help us determine the best locations for establishing human bases.
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