A research group has developed a prototype calcium (Ca) metal rechargeable battery capable of 500 cycles of repeated charge-discharge—the benchmark for practical use.

The breakthrough was reported in the journal Advanced Science on May 19, 2023.

With the use of electric vehicles and grid-scale energy storage systems on the rise, the need to explore alternatives to lithium-ion batteries (LIBs) has never been greater. One such replacement is Ca metal batteries...

For generations, physicists were sure the laws of physics were perfectly symmetric. Until they weren’t.

Symmetry is a tidy and attractive idea that falls apart in our untidy universe. Indeed, since the 1960s, some kind of broken symmetry has been required to explain why there is more matter than antimatter in the universe—why, that is, that any of this exists at all.

But pinning down the source behind this existential symmetry violation, even finding proof of it, has been impossible.

Yet in a new paper published in Monthly Notices of the Royal Astronomical Society, University of Florida astronomers have found the first evidence of this necessary violation of symmetry at the moment of creation...

A team of engineers at the University of California San Diego has developed the first fully integrated wearable ultrasound system for deep-tissue monitoring, including for subjects on the go. It facilitates potentially life-saving cardiovascular monitoring and marks a major breakthrough for one of the world’s leading wearable ultrasound labs. The paper, “A fully integrated wearable ultrasound system to monitor deep tissues in moving subjects,” is published in the May 22, 2023 issue of Nature Biotechnology.

“This project gives a complete solution to wearable ultrasound technology — not only the wearable sensor, but also th...