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Circular Rydberg atoms set three records, staying stable for 11 milliseconds

Rydberg atoms are considered promising building blocks for quantum computers and their precursors, quantum simulators. Researchers at the 5th Institute of Physics of the University of Stuttgart have achieved record values for the lifetime, size, and storage time of circular Rydberg atoms, a special form of Rydberg atom in which electrons move in a stable circular orbit around the nucleus. The findings were published in Nature Communications.

Phys.orgPhys.org22m ago

Iron Age seeds reveal the origins of Iberian wine

Spain and Portugal are two of the world's most popular wine-growing countries, with regions such as Rioja and the Douro Valley producing millions of bottles every year. This winemaking tradition dates back thousands of years, but its exact origins remain a mystery. To understand how it all started, scientists led by Carolina Royo of the Instituto de Ciencias de la Vid y del Vino in Spain took a step back into the past and studied ancient grape seeds.

Phys.orgPhys.org52m ago

Dogs show human-like brain activity when they restrain themselves

When we tell a dog "no" and it resists temptation, what happens in its brain? New research from the Department of Ethology at ELTE and the HUN-REN Research Centre of Natural Sciences suggests that dogs may do more than respond automatically: When they restrain their behavior, their brains show a pattern of activity resembling the human neural signature of self-control. The study is published in the journal Animal Cognition.

Phys.orgPhys.org1h ago

Aqueduct deposits suggest Plague of Cyprian may have emptied Nîmes around 270 A.D.

Researchers at Johannes Gutenberg University Mainz (JGU) have gleaned new insights into ancient water management in the French region around Nîmes by analyzing carbonate deposits within the Roman aqueduct that features the famous Pont du Gard bridge. Among other findings, the aqueduct—built around 50 A.D.—was expanded to include an additional water source after 11 years of operation; this event coincided with a historically documented dry spell. A century after the aqueduct's construction, the water supply to the city was deliberately throttled; it is likely that some of the water was diverted to agricultural land in the surrounding area instead.

Phys.orgPhys.org1h ago

Tyrannosaurus rex teeth reveal a body temperature close to the human average

When picturing a scaled, toothy Tyrannosaurus rex stomping across North America, building nests and eating other dinosaurs, it's easy to forget that scientists have gleaned everything we know about T. rex from clues left more than 60 million years ago. While the presence of fossils in Alaska suggested that this prehistoric ancestor of birds was already on the evolutionary path from cold-blooded reptile to warm-blooded avian, there wasn't a way to take T. rex's temperature—until now.

Phys.orgPhys.org1h ago

We may soon be able to read long-lost ancient scrolls damaged by the eruption of Mount Vesuvius

X-ray technology and artificial intelligence—along with the discovery of lead in the ink of fragments from a collection of ancient Roman scrolls—could soon help scientists read long-lost texts buried by the eruption of Mount Vesuvius in 79 CE, according to a study published Sept. 16, 2026, in the journal PLOS One by Douglas Seiler, an affiliate of the University of California, Berkeley, U.S.; Jacob Michael LaManna of the National Institute of Standards and Technology, U.S.; David Kreimer of the University of California, Berkeley, U.S.; and colleagues.

Phys.orgPhys.org1h ago