Why is Mars barren and uninhabitable, while life has always thrived here on our relatively similar planet Earth?

A discovery made by a NASA rover has offered a clue for this mystery, new research said Wednesday, suggesting that while rivers once sporadically flowed on Mars, it was doomed to mostly be a desert planet.

Mars is thought to currently have all the necessary ingredients for life except for perhaps the most important one: liquid water.

However, the red surface is carved out by ancient rivers and lakes, showing that water once flowed on our nearest neighbor.

There are currently several rovers searching Mars for signs of life that could have existed back in those more habitable t...

A pioneering new study published in Nature Microbiology, led by J. Oriol Sunyer, professor of immunology and pathobiology at the School of Veterinary Medicine, and a team of researchers at Penn Vet and the University of New Mexico, has uncovered a surprising new player in gut health: an antibody called secretory immunoglobulin M (sIgM).

While another antibody, secretory immunoglobulin A (sIgA), has long been known for helping balance the bacteria in our intestines, this new research shows that sIgM may be just as vital—if not more so—in protecting gut health and maintaining overall well-being.

Secretory immunoglobulins—immunoglobulins found in the mucosal surfaces ...

As NASA’s New Horizons spacecraft traveled through the Kuiper Belt at a distance of 438 million miles from Earth, an international team of astronomers used the far-flung probe to conduct an unprecedented experiment: the first-ever successful demonstration of deep space stellar navigation.

A paper describing the results was accepted for publication in The Astronomical Journal. The pre-print is available on the server arXiv.

As a proof-of-concept test, the researchers took advantage of the spacecraft’s unique vantage point as it traveled toward interstellar space to image two of our nearest stellar neighbors, Proxima Centauri, which is 4.2 light-years from Earth, and Wolf 359, which is 7.86 light-years away.

From New Horizons’ perspective, the two nearby stars shifted their app...

Capital Medical University, in collaboration with the Chinese Academy of Sciences, reports that betaine, a molecule produced in the kidney and enhanced through sustained exercise, operates as a potent inhibitor of inflammatory and aging-related pathways.

Regular physical activity boosts health across cardiovascular, metabolic, and neurological systems. Scientists have traced improvements in immune function, insulin sensitivity, clearing of senescent cells and tissue regeneration to consistent physical activity. Earlier animal studies suggested that long-term exercise can delay aging processes and reduce vulnerability to chronic disease.

Precise molecular explanations for how sustained exercise reshapes human biology remain incomplete...