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The premier online source for science news since 1996. A service of the American Association for the Advancement of Science.
A new species of gigantic tumbleweed once predicted to go extinct is not only here to stay -- it's likely to expand its territory. A new study from UC Riverside supports the theory that the new tumbleweed grows more vigorously than its progenitors because it is a hybrid with doubled pairs of its parents' chromosomes.
A University of Texas at Dallas physicist has teamed with Texas Instruments to design a better way for electronics to convert waste heat into reusable energy. Silicon in the form of nanoblades can harvest thermoelectric energy at a greatly increased rate while remaining mass-producible when combined with integrated circuits.
The purpose of going to school is to learn, but students may find certain topics difficult to understand if they don't have the necessary background knowledge. This is one of the conclusions of a research article published in Psychological Science, a journal of the Association for Psychological Science.
New, more effective antibiotics are being prescribed in only about a quarter of infections by carbapenem-resistant Enterobacteriaceae (CRE), a family of the world's most intractable drug-resistant bacteria, according to an analysis by scientists at the University of Pittsburgh School of Medicine. This sluggish uptake of such high-priority antibiotics prompted the researchers to call for an examination of clinical and pharmaceutical stewardship practices across US hospitals, as well as behavioral and economic factors.
Heart muscle can continue to die even after restoring blood following a heart attack, and scientists have new evidence that one way to help it live is by boosting levels of a tiny RNA that helped the heart form.
In a new study of patients with retinitis pigmentosa, an inherited degenerative eye disease that results in poor vision, Keck School of Medicine of USC researchers found that adapted augmented reality glasses can improve patients' mobility by 50% and grasp performance by 70%.
A study from a Swedish team of researchers recently published in the social science journal Nature Human Behaviour answers several critical questions on how public opinion changes on moral issues. They have created a scientific model that can predict public opinion changes on moral issues.
Nearly one in four Arizona teens have used a highly potent form of marijuana known as marijuana concentrate, according to a new study by Arizona State University researchers. Among nearly 50,000 eighth, 10th, and 12th graders from the 2018 Arizona Youth Survey, a biennial survey of Arizona secondary school students, one-third (33%) had tried some form of marijuana, and nearly a quarter (24%) had tried marijuana concentrate.
In one of the largest studies of its kind, researchers at Orlando Health are making new progress in finding ways to detect a traumatic yet sinister brain injury -- and getting closer to preventing further damage.
Study finds that some physicians do not counsel cancer survivors on adopting a healthy lifestyle.
Vaccinating older adults against shingles in Canada is likely cost-effective, according to a study in CMAJ (Canadian Medical Association Journal), and the Shingrix vaccine appears to provide better protection than the Zostavax vaccine.
Animals that do well in urban areas tend to be the ones that learn to make use of resources such as the food humans throw away. But is our food actually good for them? A new study published in The Condor: Ornithological Applications suggests that a diet of human foods such as discarded cheeseburgers might be giving American crows living in urban areas higher blood cholesterol levels than their rural cousins.
Scientists may have found a way to pull down the protective wall that surrounds tumors, potentially re-exposing them to the killing power of the immune system and immunotherapy treatments, according to a study part funded by Cancer Research UK and published in EBioMedicine today.
A UC Davis Violence Prevention Research Program (VPRP) study, which will publish Aug. 25 in Injury Epidemiology, assessed the sharp rise in handgun purchasing in 2012 after Sandy Hook and the re-election of President Obama, across 499 Californian cities. It estimated whether the excess handgun purchases increased fatal and non-fatal injuries. It found that these spikes in handgun purchases have been linked to a 4% increase in firearm injury in California.
For years, scientists have been trying to solve a medical mystery: Why do people with diabetes have an increased risk of developing some forms of cancer? Today, researchers report a possible explanation for this double whammy. They found that DNA sustains more damage and gets fixed less often when blood sugar levels are high, thereby increasing cancer risk. The researchers will present their results at the American Chemical Society Fall 2019 National Meeting & Exposition.
Since the first states legalized recreational marijuana in 2012, several others have joined them, and cannabis-infused edibles, including gummy bears, cookies and chocolates, have flooded the market. But these sweet treats have created confusing results for scientists trying to analyze their potency and purity. Now researchers report that components in chocolate might be interfering with cannabis potency testing. The researchers will present their results at the American Chemical Society Fall 2019 National Meeting & Exposition.
Nearly 100,000 new cases of melanoma are diagnosed annually, and 20 Americans die every day from it. Now, researchers have developed a skin patch that efficiently delivers medication within one minute to attack melanoma cells. The device, tested in mice and human skin samples, also could be adapted to deliver other vaccines. The scientists present their findings today at the American Chemical Society Fall 2019 National Meeting & Exposition.
Scientists from Tokyo Metropolitan University and Ritsumeikan University have found a link between the 'roundness' distribution of tsunami deposits and how far tsunamis reach inland. They sampled the 'roundness' of gravel from different tsunamis in Koyadori, Japan, and found a common, abrupt change in composition approximately 40% of the 'inundation distance' from the shoreline, regardless of tsunami magnitude. Estimates of ancient tsunami size from geological deposits may help inform effective disaster mitigation.
Mule deer navigate in spring and fall mostly by using their knowledge of past migration routes and seasonal ranges.
Salk Institute researchers have developed a new tool -- dubbed SATI -- to edit the mouse genome, enabling the team to target a broad range of mutations and cell types. The new genome-editing technology could be expanded for use in a broad range of gene mutation conditions such as Huntington's disease and the rare premature aging syndrome, progeria.