The Earth's magnetic field experiences unpredictable, rapid, and intense anomalies that are known as geomagnetic jerks. The mechanisms behind this phenomenon had remained a mystery until the recent research. Scientists have now created a computer model for these geomagnetic jerks, and provided an explanation for their appearance.
In 2018, a team of astronomers from the United States and Canada discovered that an ultra-diffuse galaxy called NGC 1052-DF2 (DF2 for short) contains virtually no dark matter. The galaxy is roughly the size of our Milky Way Galaxy, but hosts only 1/200 the number of stars. It lies in the constellation of Cetus, about [...]
If you've ever spent some time in the Caribbean, you might have noticed that humans are not the only organisms soaking up the sun. Anoles -- diminutive little tree lizards -- spend much of their day shuttling in and out of shade. But, according to a new study, this behavioral 'thermoregulation' isn't just affecting their body temperature. Surprisingly, it's also slowing their evolution.
A study reveals shipwrecks off North Carolina's coast are important habitats for sand tiger sharks, whose population plummeted in the 1980 and 1990s. Photos taken months and even years apart by scuba divers show female sand tiger sharks returning to the same shipwrecks. The photos were uploaded to the citizen-science program Spot A Shark USA which used specialized software to ID the sharks.
A simple change in the choice of grass varieties for lawns of St. Augustinegrass could be a key tool for fending off fall armyworm infestations, according to new research. While no single St. Augustinegrass cultivar rises above the rest in resisting infestation, mixing varieties may confer some benefits, as fall armyworms clearly preferred single-cultivar plantings in a series of lab tests.
A new study reveals that many people with cancer use marijuana, and rates of use in the US have increased over time. The study also found that patients with cancer are more likely to use prescription opioids than adults without cancer.
A pair of researchers describes a way of making a submicron-sized cylinder disappear without using any specialized coating. Their findings could enable invisibility of natural materials at optical frequency and eventually lead to a simpler way of enhancing optoelectronic devices, including sensing and communication technologies.
In a small study of patients, researchers report that about half the people referred to the clinic with a schizophrenia diagnosis didn't actually have schizophrenia. Schizophrenia is a chronic, severe and disabling disorder marked by disordered thinking, feelings and behavior. People who reported hearing voices or having anxiety were the ones more likely to be misdiagnosed.
A team of astronomers from the United Kingdom and Germany has spotted a superflare coming from an L-dwarf star approximately 250 light-years away that’s estimated to be 10 times more powerful than any such event emitted by the Sun. L-dwarf stars are among the lowest mass objects that could still be considered to be a [...]
Modular -- or cliquey -- group structure isolates the flow of communication between individuals, which might seem counterproductive to survival. But for some animal groups, formation isn't necessarily better, according to new research.