Medium-weight black holes may exist after all. Astronomers say signs of a black hole with about 2,200 times the mass of the sun have been detected at the center of the star cluster 47 Tucanae. If confirmed, the discovery could hint at a new class of black holes, ones starved of gas. “It’s notoriously challenging […]

Malaria parasites seduce mosquitoes on the sly. Plasmodium falciparum parasites produce a molecule that makes parasite-infected blood more attractive to malaria-transmitting mosquitoes, researchers report online February 9 in Science. The insects slurp up this enticing meal, helping the parasite spread to new hosts. “It’s a really intriguing glimpse into how Plasmodium might have evolved to […]

WASHINGTON — Diagnosing Ebola earlier is becoming almost as easy as taking a home pregnancy test. Scientists are developing antibodies for a test that can sniff out the deadly virus more quickly and efficiently than current tests, researchers reported February 6 at the American Society for Microbiology Biothreats meeting. Detecting Ebola’s genetic material in patients’ […]

BOSTON — Microbes found stowed inside giant crystals in caves in Chihuahua, Mexico, may have survived there for tens of thousands of years. The microorganisms, which appear to be vastly different from nearly all life-forms found on Earth, offer a good indication of how resilient life can be in extremely harsh environments, including those found […]

Tiny, iron-rich fossils exhumed from the depths of an ancient ocean could reveal the cradle of life. These micrometer-scale structures are probably remnants of microorganisms that once lived amidst ancient hydrothermal vents, researchers suggest March 1 in Nature. “In a nutshell, what we’ve found are the oldest microfossils on Earth,” says study coauthor Matthew Dodd, […]

Never underestimate the power of a little sunlight. Light particles, or photons, emitted from the sun’s surface, could explain a long-standing solar mystery — why the sun’s outermost layers rotate more slowly than its core. Because the sun isn’t a solid ball, regions at different depths or latitudes rotate at different rates. For decades, scientists […]

At least one of comet 67P/Churyumov-Gerasimenko’s dusty outbursts was the result of a landslide. But such changes to the surface of the comet haven’t radically altered its appearance, suggesting it has had roughly the same look for decades — or longer. Images from the Rosetta spacecraft taken before its demise show what happened to the […]

SAN FRANCISCO — Girls and boys with attention-deficit/hyperactivity disorder don’t just behave differently. Parts of their brains look different, too. Now, researchers can add the cerebellum to that mismatch. For boys, symptoms of the disorder tend to include poor impulse control and disruptive behavior. Girls are more likely to have difficulty staying focused on one […]

Biologist Leo Smith held an unusual job while an undergraduate student in San Diego. Twice a year, he tagged along on a chartered boat with elderly passengers. The group needed him to identify two particular species of rockfish, the chilipepper rockfish and the California shortspine thornyhead. Once he’d found the red-orange creatures, the passengers would […]

Carving nanostructures with a laser creates long-lasting colors. Researchers developed the new printing technique as an alternative to ink-based printing, in which colors fade with time. Aside from eternally vibrant art, the technique could lead to new types of color displays or improve security labels, the scientists report in the May 5 Science Advances. Anders […]