Record-shattering X-ray pulses focus into spot 100,000 times smaller than a hair - Interesting Engineering

We’re sharing this article early to provide faster access to peer-reviewed, accepted research. It is citable and carries a permanent DOI. This version is subject to further edits and will be replaced automatically by the final Version of Record. All legal disclaimers apply. AbstractWe demonstrate a mechanism for the deterministic nucleation of magnetic hopfions in cylindrical nanopillars via transient magnetic field pulses. By exploiting a chiral magnetic cylinder with engineered surface uniaxial anisotropy, we show that field pulses trigger a non-equilibrium magnetization dynamics. Depending on the pulse amplitude, the system relaxes into distinct topologically protected energy minima, stabilizing either isolated hopfions or coexisting states with other three-dimensional solitons. This approach offers a framework for manipulating 3D topological textures without requiring localized spin-polarized currents, broadening the understanding of three-dimensional nanomagnetism.

In the early history of our solar system, scientists theorize that a Mars-sized object called Theia smashed into the infant Earth, vaporizing massive amounts of rock and blasting it into space. Some of that material coalesced into the Moon, where NASA’s Artemis program is returning humans, preparing for Mars, and shaping the future of space exploration. That long-ago, violent collision reshaped our home planet. Astronomers have used NASA’s James Webb Space Telescope to examine a class of young stellar systems that show signs of similar upheavals, providing clues to the amount of energy in their collisions. The results offer insights into the composition and evolution of these chaotic systems.

Babies who are smaller than expected at birth tend to have poorer school performances as teenagers, a study has found. More than 92,000 children were followed from infancy to adolescence, all of whom were born at full term, between 37 and 41 weeks pregnant. The researchers at the University of Warwick found that children who weighed less than most babies of the same sex, born at the same stage of pregnancy, tended to achieve lower scores in subjects like mathematics and reading. The differences were still apparent in adolescence, suggesting that the link between size at birth and academic performance persists well beyond early childhood into mid-teens. "For babies born at term, being small for their stage of pregnancy may indicate adverse effects on the brain that affect learning and last into adolescence," Prof Dieter Wolke said. However, he said the long-term effects of being born small may be altered by parenting home stimulation and school support.

Some cancers grow faster, spread more aggressively, and respond less effectively to treatment than others. Researchers at Virginia Tech are uncovering surprising reasons behind these differences, including how abnormal cancer cells recruit healthy tissue to support tumor growth and why the size of certain cancer cells could help predict their danger. The discoveries emerged from years of painstaking laboratory work, including the careful examination of tumors grown in mice.