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Some stars appear to defy time itself. Nestled within ancient star clusters, they shine bluer and brighter than their neighbors, looking far younger than their true age. Known as blue straggler stars, these stellar oddities ...

Bowel habits aren't exactly dinner-table talk. But they reflect how quickly the gut moves things along, and when that goes wrong, people can experience constipation, diarrhea, or irritable bowel syndrome (IBS). Yet the biological ...

A new transceiver invented by electrical engineers at the University of California, Irvine boosts radio frequencies into 140-gigahertz territory, unlocking data speeds that rival those of physical fiber-optic cables and laying ...

Millions of people worldwide are diagnosed with cancer every year. In advanced tumor diseases, cancer cells detach from the original tumor and settle in other parts of the body to form metastases. On their way, they have ...

Brain tumors are abnormal growths of cells in or around the brain. They can be primary (originating in the brain) or secondary (metastatic, spreading to the brain from cancer elsewhere).

The astronauts evacuated last week from the International Space Station say a portable ultrasound machine came in "super handy" during the medical crisis.

Researchers at Leipzig University and TU Dresden have succeeded in developing biological switches that can selectively turn ion channels on and off using light pulses. Initial applications show that it is possible, for example, ...

Deep neural networks (DNNs) have become a cornerstone of modern AI technology, driving a thriving field of research in image-related tasks. These systems have found applications in medical diagnosis, automated data processing, ...

Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study by Upama Aich at the University of Western Australia and colleagues, published in PLOS Biology.

An international research team led by scientists at Waseda University and Tohoku University has discovered an extraordinary quasar in the early universe that hosts one of the fastest-growing supermassive black holes known ...

Astronomers have long searched for life within a rather narrow ring around a star, the "habitable zone," where a planet should be neither too hot nor too cold for liquid water. A new study argues that this ring is too strict: ...

When we think of the world's oldest art, Europe usually comes to mind, with famous cave paintings in France and Spain often seen as evidence this was the birthplace of symbolic human culture. But new evidence from Indonesia ...