It was as a Ph.D. student that Dionna Williams realized the fundamental flaws in how medical science treats people who have HIV and also use illicit drugs or misuse prescription drugs. People in this group often have worse outcomes than people with HIV who don’t use these drugs. Drug use and addiction have been linked … Ler mais
Heat-related deaths in the United States are on the rise. But how bad will it be 20, 30 or 40 years from now? Scientists now have a clue. Currently, an estimated 8,000-plus deaths in the United States every year are associated with extreme temperatures, both hot and cold. Within the next few decades, that number … Ler mais
Kur virusi që shkakton mpox u hodh në skenën ndërkombëtare në vitin 2022, vendet në mbarë botën, përfshirë Shtetet e Bashkuara, iu drejtuan vaksinave që synonin virusin e lisë së lidhur ngushtë për të frenuar përhapjen e tij. Megjithatë, deri në vitin 2024, Afrika, kontinenti ku u shfaq virusi dhe filloi të përhapet fillimisht mes … Ler mais
After a devastating spinal cord injury, mice’s nerve cells balloon up in size. Some of these neurons stay swollen longer than expected and begin to die, a study published September 25 in Science Translational Medicine shows. A drug that brought this swelling down improved the mice’s recovery, though it’s not yet known if the approach … Ler mais
Symptoms of depression fluctuate over time, but many brain imaging studies of the condition only study one point in time. That’s made it hard to connect networks of brain activity to various symptoms and mood changes. Now, a new study using long-term brain imaging data shows one brain network involved in guiding attention is nearly … Ler mais
Neanderthals traveled at least two evolutionary paths on their way to extinction around 40,000 years ago, a new study suggests. If it is classified as a separate species or a variant of Homo sapiensNeanderthals have usually been seen as a genetically stable population. But the partial skeleton of an adult male discovered in France contains … Ler mais
citations J. O’Conner et al. Effect of ashwagandha on stress, sleep quality, and food cravings in college students: quantitative analysis of a double-blind randomized control trial. Journal of Medicinal Food. Vol. December 25, 2022, p. 1086. doi: 10.1089/jmf.2022.0040. C. Baker et al. Perceived impact of ashwagandha on stress, sleep quality, energy, and mental clarity in … Ler mais
African rock art depicting a mythical tufted creature may reflect the appearance of fossilized real-life relatives of ancient mammals called dicynodonts. Abundant fossils exposed in South Africa’s Karoo Basin include dicynodont skulls with tusks that bend down and back, like those of the long-bodied animal depicted in roughly 200-year-old rock art by the region’s San … Ler mais
Among the more than 500 species of bacteria that thrive in the human mouth, one seems to play by its own rules. Instead of reproducing by dividing into two, as most bacteria do, Corynebacterium matruchotii divides into 14 cells simultaneously, researchers report on Sept. 10. Proceedings of the National Academy of Sciences. This video shows … Ler mais
A cyclist is pedaling on the road. Signs, trees and fire hydrants pass by. As they cycle, their brain receives information from what they have perceived but can no longer see. Their brains sort through that information—color, shape, and text in signs, for example—and pick out what’s most important. Based on this, the motorist takes … Ler mais