About 15% of asteroids near Earth have small moons orbiting them, making binary asteroid systems common in our cosmic neighborhood.

Prior infection is protective against SARS-CoV-2 infection, but the degree of protection provided by multiple subsequent infections is not clear. Here, the authors use data from a household transmission study in Nicaragua and show that 1, 2 or 3+ infections are associated with increasing...

Orthohantaviruses, such as the Puumala virus, are widespread in Europe, causing flu-like illnesses and severe kidney damage in those infected. It is increasingly considered a zoonotic threat. Researchers from the Medical Faculty of the University of Duisburg-Essen and the University Hospital Essen, Germany, have gained new insights into how these viruses alter the internal structure of their host cells. Their findings are published in the Journal of General Virology.

In some parts of the deep ocean, it can look like it's snowing. This "marine snow" is the dust and detritus that organisms slough off as they die and decompose. Marine snow can fall several kilometers to the deepest parts of the ocean, where the particles are buried in the seafloor for millennia.

After a heart attack, the heart struggles to recoup and maintain energy. One-third of patients develop heart failure as a result—a condition that impacts 6.8 million Americans and carries a high lifetime risk, with 1 in 4 adults in the U.S. expected to develop the condition during their lifetime. This makes finding lasting treatment a medical priority.

A Purdue University contraceptive vaccine seeks to address animal overpopulation by markedly reducing fertility in feral horses, deer, swine and other animals. Dr. Harm HogenEsch, distinguished professor of immunopathology in Purdue University's College of Veterinary Medicine, and Dr. Raluca Ostafe, director of Purdue University's Molecular Evolution Protein Engineering and Production Facility, both members of the Purdue Institute for Inflammation, Immunology and Infectious Disease, have designed the vaccine based on the IZUMO1 mammalian sperm protein. It induces a robust and long-lasting immune response and infertility in female mammals.

Our single-celled ancestor lived in a world without plants, animals or oxygen-rich oceans. Yet, this seemingly simple microorganism took the first steps toward complex life. From this ancestor emerged all multicellular (complex) life as we know it today: from yeast to blue whales, collectively known as eukaryotes. These organisms are built from cells containing specialized structures, such as a nucleus and other specialized structures, each performing distinct functions.

Walking on two legs has long been considered a milestone in human evolution and one of our most defining characteristics. Until now, researchers assumed that the first humans originated in Africa and that bipedalism developed there around 6 million years ago. However, an international team of researchers say a newly discovered fossil thighbone from Bulgaria could rewrite the history of human origins.

Ever since physicist Freeman Dyson first proposed the concept in 1960, the "Dyson sphere" has been the holy grail of techno-signature hunters. A highly advanced civilization could build a "sphere" (or, in our more modern understanding, a "swarm" of smaller components) around their host star to harvest its entire energy output. We know, in theory at least, that such a swarm could exist—but what would it actually look like if we were able to observe one? A new paper, available on the arXiv pre-print server and soon to be published in Universe from Amirnezam Amiri of the University of Arkansas, digs into that question—and in the process discloses the types of stars that are the most likely to find them around.

Nonsense-mediated mRNA decay (NMD) is one of the most important processes in our cells to ensure that no faulty or incomplete proteins are produced. Scientists have now identified a central mechanism behind this control system.

This study reveals that Amphotericin B activates glucocerebrosidase to remodel late endosomal lipid and protein composition, promoting respiratory viral entry. This highlights a risk of secondary viral infections during antifungal therapy.

Comet 3I/ATLAS continues to make astonishing headlines, thanks to new findings from astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA). This new research reveals that 3I/ATLAS is packed with an unusually large amount of the organic molecule methanol—more than almost all known comets in our own solar system.

In 2020, a study confirmed that two planets orbited the nearby red dwarf, GJ 887. Now, astronomers have confirmed the existence of two additional planets orbiting GJ 887 in a new study published in Astronomy and Astrophysics. The new study suggests that one of these newly confirmed planets is in the habitable zone.

Long before humans cultivated crops or sailed between continents, a group of plant viruses was already evolving among wild plants in Eurasia. According to a new international study published in Plant Disease, the ancestors of modern tymoviruses likely emerged before the last Ice Age, reshaping scientists' understanding of the vast evolutionary history of plant disease.

Deep-sea waters are warming due to heat waves and climate change, and it could spell trouble for the oceans' delicate chemical and biological balance. However, a study published in Proceedings of the National Academy of Sciences demonstrates that the microbe Nitrosopumilus maritimus may already be adapting well to warmer, nutrient-poor waters. Researchers predict that these surprisingly adaptable iron-dependent ammonia-oxidizing archaea will play an important role in reshaping ocean-nutrient distribution in a changing climate.

HIV-1 Gag virus-like particles (VLPs) have been drawing attention as vaccine platform for their non-infectivity, ability to induce robust immune responses and versatility. However, challenges in their production, purification, and preservation still hinder their application.

Hepatitis C virus (HCV) infects an estimated 50 million people worldwide, according to the World Health Organization, and remains a leading cause of cirrhosis and liver cancer. While antiviral drugs can cure most infections, global access remains limited and these drugs do not stop reinfection.

WEDNESDAY, March 4, 2026 -- For patients with postacute sequelae of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection (PASC), neither metformin nor ursodeoxycholic acid (UDCA) improves symptoms compared with placebo, according...