Results from a small clinical trial suggest it may be possible to reduce the risk of dementia by eating during fewer hours of the day. The pilot study, which involved a weight-loss program for older women with overweight or obesity, showed modest cognitive improvements among those who limited their daily eating window instead of just reducing their calorie intake.

“Losing weight alone will ward off some of the aging-related cognitive decline, and these data suggest that there may be additional benefits if you stop eating four hours before going to sleep and reduce food intake to 8–9 hours per day, compared with the usual eating window of 12 hours per day,” said Sue Shapses, Ph.D...

A new type of 3D-printable material developed by researchers at The University of Texas at Austin mimics human tissue’s ability to sort and filter, allowing certain molecules to pass through while keeping others out. This broad functionality means the material can be used in a variety of applications across medicine, water and robotics.

Current methods for building small tissue-like materials don’t scale to sizes that can make applications possible, the researchers say. The team overcame these issues of speed and scalability by jamming billions of tiny water droplets tightly together using simple mixing and centrifuge techniques to form large, tissue-like materials in just a few minutes...

Chinese astronomers report the detection of a peculiar optical transient event that occurred in the center of a dwarf galaxy. The newly discovered event, designated AT2019ijncn a paper published July 6 in The Astrophysical Journal Letters.

One of the rarest transients
Among astronomical tra...

Biomedical engineers at Duke University have developed an injectable biomaterial that helps transform the cavity left behind after a stroke caused by a blood clot into an environment more supportive of repair. By recruiting the body’s own immune cells, the treatment promoted the growth of new blood vessels, supported neural remodeling and improved motor performance in mice. The work appears in Cell Biomaterials.

Every year, millions of people experience strokes caused by blood clots, called ischemic strokes. Immediate treatments, including clot-dissolving drugs and mechanical removal of the clot, can restore blood flow and preserve threatened brain tissue. But these treatments cannot replace tissue that has already been lost.

Large strokes can result in substantial tissue loss a...