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All Top News -- ScienceDaily

Published: Jul 23, 2021 7:00:02 PM
Top science stories featured on ScienceDaily's home page.
  • Jul 22, 2021 8:30:28 PM
    Researchers have been able to use seismic data to look inside Mars for the first time. They measured the crust, mantle and core and narrowed down their composition.
  • Jul 22, 2021 6:20:37 PM
    As a newborn mammal opens its eyes for the first time, it can already make visual sense of the world around it. But how does this happen before they have experienced sight?
  • Jul 22, 2021 3:30:52 PM
    Scientists have successfully reversed age-related memory loss in mice and say their discovery could lead to the development of treatments to prevent memory loss in people as they age.
  • Jul 20, 2021 4:05:38 PM
    Scientists who study glacier ice have found viruses nearly 15,000 years old in two ice samples taken from the Tibetan Plateau in China. Most of those viruses, which survived because they had remained frozen, are unlike any viruses that have been cataloged to date.
  • Jul 14, 2021 9:41:48 PM
    Researchers have successfully developed a 'speech neuroprosthesis' that has enabled a man with severe paralysis to communicate in sentences, translating signals from his brain to the vocal tract directly into words that appear as text on a screen.
  • Jul 13, 2021 8:53:03 PM
    A decade after scientists discovered that lab rats will rescue a fellow rat in distress, but not a rat they consider an outsider, new research pinpoints the brain regions that drive rats to prioritize their nearest and dearest in times of crisis. It also suggests humans may share the same neural bias.
  • Jul 9, 2021 2:41:57 PM
    A team of physicists has developed a special type of quantum computer known as a programmable quantum simulator capable of operating with 256 quantum bits, or 'qubits.'
  • Jul 8, 2021 9:03:31 PM
    Researchers discovered that most bacteria in the gut microbiome are heritable after looking at more than 16,000 gut microbiome profiles collected over 14 years from a long-studied population of baboons in Kenya's Amboseli National Park. The team also found that several of the microbiome traits heritable in baboons are also heritable in humans.
  • Jul 8, 2021 6:38:56 PM
    The ability to focus on where we will be in the near future, rather than where we are at present, may be a key characteristic of the mammalian brain's built-in navigation system, suggests a new study. The researchers wirelessly tracked the brain activity of flying Egyptian fruit bats, finding that neural activity in the bats' hippocampuses more strongly represented future locations than current locations.
  • Jul 8, 2021 5:47:56 PM
    Scientists map the part of the brain that 'links' similar objects, leading to new insights about how the brain processes information out of context.
  • Jul 7, 2021 3:23:56 PM
    New research shows radioactive molecules are sensitive to subtle nuclear phenomena. The molecules might help physicists probe violation of the most fundamental symmetries of nature, including why the universe contains relatively little antimatter.
  • Jul 6, 2021 10:09:05 PM
    A study concludes that known geochemical processes can't explain the levels of methane measured by the Cassini spacecraft on Saturn's icy moon. While the paper by no means suggests that life exists on Enceladus, the results would be consistent with microbial activity similar to that known to occur at hydrothermal vents in Earth's oceans. 
  • Jul 5, 2021 1:47:25 PM
    Flies have discriminating taste. Like a gourmet perusing a menu, they spend much of their time seeking sweet nutritious calories and avoiding bitter, potentially toxic food. But what happens in their brains when they make these food choices? Researchers discovered an interesting way to find out. They tricked them.
  • Jul 2, 2021 7:43:45 PM
    Neuroscientists have demonstrated in new research that dopamine plays a key role in how songbirds learn complex new sounds.
  • Jul 2, 2021 7:43:14 PM
    A new study disputes the prevailing hypothesis on why Mercury has a big core relative to its mantle. For decades, scientists argued that hit-and-run collisions blew away much of Mercury's rocky mantle and left the big, dense, metal core inside. But new research reveals that collisions are not to blame -- instead, the density, mass and iron content of a rocky planet's core is influenced by its distance from the sun's magnetic field.
  • Jul 1, 2021 6:09:59 PM
    In COVID-19 patients whose symptoms were mild, researchers found that they were more likely than sicker patients to have signs of prior infection by similar, less virulent coronaviruses.
  • Jul 1, 2021 6:09:31 PM
    Current rates of plastic emissions globally may trigger effects that we will not be able to reverse, argues a new study. According to the authors, plastic pollution is a global threat, and actions to drastically reduce emissions of plastic to the environment are 'the rational policy response.'
  • Jul 1, 2021 6:09:29 PM
    Our brains have sensory cells, which process the faces that we see, and memory cells dedicated to storing data from person encounters. But until now, a hybrid neuron capable of linking vision to memory -- and explaining how we recall familiar faces -- remained elusive.
  • Jul 1, 2021 3:27:07 PM
    Last August, sea ice north of Greenland showed its vulnerability to the long-term effects of climate change. The region, part of what's known as the 'Last Ice Area' that could serve as a refuge for ice-dependent species, may be ice-free in summertime sooner than expected.
  • Jun 30, 2021 1:13:58 PM
    Our universe is expanding, but our two main ways to measure how fast this expansion is happening have resulted in different answers. An astronomer gives an overview of the most recent observations. New conclusion: the latest observations are beginning to close the gap. That is, there may not be a conflict after all, and our standard model of the universe does not need to be significantly modified.
  • Jun 29, 2021 2:11:55 PM
    A long time ago, in two galaxies about 900 million light-years away, two black holes each gobbled up their neutron star companions, triggering gravitational waves that finally hit Earth in January 2020. Astrophysicists' observation of the two events -- detected just 10 days apart -- mark the first-ever detection of a black hole merging with a neutron star.
  • Jun 28, 2021 3:41:36 PM
    Scientists have discovered the first convincing evidence for a new type of stellar explosion -- an electron-capture supernova. While they have been theorized for 40 years, real-world examples have been elusive. They are thought to arise from the explosions of massive super-asymptotic giant branch (SAGB) stars, for which there has also been scant evidence.
  • Jun 25, 2021 4:04:19 PM
    A near-perfectly preserved ancient human fossil known as the Harbin cranium sits in the Geoscience Museum in Hebei GEO University. The largest of Homo skulls, scientists now say this skull represents a newly discovered human species named Homo longi or 'Dragon Man.' Their findings suggest that the Homo longi lineage may be our closest relatives -- and may reshape our understanding of human evolution.
  • Jun 24, 2021 6:15:40 PM
    The bones of an early human, unknown to science, who lived in the Levant at least until 130,000 years ago, were discovered in excavations at the Nesher Ramla site, near the city of Ramla. Recognizing similarity to other archaic Homo specimens from 400,000 years ago, found in Israel and Eurasia, the researchers reached the conclusion that the Nesher Ramla fossils represent a unique Middle Pleistocene population, now identified for the first time.
  • Jun 23, 2021 3:39:05 PM
    Scientists have identified 2,034 nearby star-systems -- within the small cosmic distance of 326 light-years -- that could find Earth merely by watching our pale blue dot cross our sun.
  • Jun 22, 2021 7:43:39 PM
    A new study offers quantitative evidence linking psychological stress to graying hair in people.
  • Jun 18, 2021 5:39:59 PM
    It could be a milestone on the path to detecting life on other planets: Scientists detect a key molecular property of all living organisms from a helicopter flying several kilometers above ground. The measurement technology could also open up opportunities for remote sensing of the Earth.
  • Jun 18, 2021 1:17:03 PM
    In a bid to find or refine laboratory research models for cancer that better compare with what happens in living people, scientists report they have developed a new computer-based technique showing that human cancer cells grown in culture dishes are the least genetically similar to their human sources.
  • Jun 17, 2021 6:36:59 PM
    Researchers studying prions -- misfolded proteins that cause lethal incurable diseases -- have identified the surface features of human prions responsible for their replication in the brain.
  • Jun 17, 2021 6:36:25 PM
    In the last few decades, physicists have found ways to super-cool objects so that their atoms are at a near standstill, wrestling small objects such as clouds of millions of atoms, or nanogram-scale objects, into such pure quantum states. Now scientists have cooled a large, human-scale object to close to its motional ground state. The object isn't tangible in the sense of being situated at one location, but is the combined motion of four separate objects. The 'object' that the researchers cooled has an estimated mass of about 10 kilograms, and comprises nearly 1 octillion atoms.
  • Jun 17, 2021 3:55:36 PM
    Using neural networks, researchers have developed a new method to search the human genome for beneficial mutations from Neanderthals and other archaic humans. These humans are known to have interbred with modern humans, but the overall fate of the genetic material inherited from them is still largely unknown. Among others, the researchers found previously unreported mutations involved in core pathways in metabolism, blood-related diseases and immunity.
  • Jun 16, 2021 1:41:41 PM
    Philosophers, artists and scientists -- and probably all the rest of us -- have long obsessed over the key to human immortality. We all, no matter our income, culture or religion are bound to die. Even if we escape mortal diseases or accidents, we all face a deadly biological deterioration. While the debate of human longevity has divided the scientific community for centuries, a new study finds fresh evidence for our inevitable death.
  • Jun 11, 2021 3:08:07 PM
    Researchers have identified the brain regions involved in choosing whether to find out if a bad event is about to happen.
  • Jun 7, 2021 8:10:00 PM
    A new study predicts massive range declines of Africa's great apes -- gorillas, chimpanzees and bonobos -- due to the impacts of climate change, land-use changes and human population growth.
  • Jun 4, 2021 5:54:33 PM
    Why do some babies react to perceived danger more than others? According to new research, part of the answer may be found in a surprising place: an infant's digestive system.
  • Jun 3, 2021 9:11:19 PM
    The biggest shark attack in history did not involve humans. A new study by earth scientists has turned up a massive die-off of sharks roughly 19 million years ago. It came at a period in history when there were more than 10 times more sharks patrolling the world's oceans than there are today.
  • Jun 2, 2021 1:14:09 PM
    Scientists have experimentally measured the bite force of adult T. rexes but not of younger tyrannosaurs. Fossils with juvenile bite marks have now allowed experts to experimentally test how hard juveniles could chomp. Though their bite force is one-sixth that of an adult, it is still stronger than that of living hyenas. The measurement is higher than previous estimates, suggesting a different ecological niche for these youngsters.
  • Jun 1, 2021 11:41:51 PM
    New research finds that elephants dilate their nostrils in order to create more space in their trunks, allowing them to store up to nine liters of water. They can also suck up three liters per second -- a speed 50 times faster than a human sneeze. The findings could inspire different ways to building robots that manipulate air to move or hold things.
  • Jun 1, 2021 8:51:01 PM
    Scientists are understanding more about natural killer (NK) cells, which are your allies when it comes to fighting infections and cancer.
  • May 28, 2021 7:05:07 PM
    A team has developed a new brain stimulation technique using focused ultrasound that is able to turn specific types of neurons in the brain on and off and precisely control motor activity without surgical device implantation.
  • May 28, 2021 3:41:07 PM
    A genetic study of 840,000 people found that shifting sleep time earlier by just an hour decreases risk of major depression by 23 percent.
  • May 28, 2021 12:42:30 AM
    Scientists investigated how the immune system's previous exposure to cold-causing coronaviruses impact immune response to COVID-19. In doing so, they discovered one cross-reactive coronavirus antibody that's triggered during a COVID-19 infection.
  • May 27, 2021 6:52:52 PM
    Biologists have created a new classification system for cell nuclei -- and shown how they can be transmuted from one type into another.
  • May 26, 2021 5:21:31 PM
    Electric fish pause before sharing something particularly meaningful. Pauses also prime the sensory systems to receive new and important information. The study reveals an underlying mechanism for how pauses allow neurons in the midbrain to recover from stimulation.
  • May 26, 2021 1:31:11 PM
    Tiny charged electrons and protons which can damage satellites and alter the ozone have revealed some of their mysteries to scientists.
  • May 26, 2021 12:50:58 PM
    What information is retained in a memory over time, and which parts get lost? These questions have led to many scientific theories over the years, and now researchers have been able to provide some answers.
  • May 25, 2021 3:37:17 PM
    In work that could one day help athletes as well as aging adults regenerate tissue more effectively, scientists increased the regeneration of muscle cells in mice by activating the precursors of muscle cells.
  • May 25, 2021 2:17:16 PM
    A new map of dark matter in the local universe reveals several previously undiscovered filamentary structures connecting galaxies. The map, developed using machine learning, could enable studies about the nature of dark matter as well as about the history and future of our local universe.
  • May 20, 2021 5:37:47 PM
    A growing body of research has explored the ability of solar geoengineering to reduce physical climate changes. But much less is known about how solar geoengineering could affect the ecosystem and, particularly, agriculture. Now, research finds that solar geoengineering may be surprisingly effective in alleviating some of the worst impacts of global warming on crops.
  • May 17, 2021 6:47:24 PM
    The development of dementia late in life is associated with abnormal blood levels of dozens of proteins up to five years earlier, according to a new study. Most of these proteins were not known to be linked to dementia before, suggesting new targets for prevention therapies.
  • May 17, 2021 4:49:38 PM
    New research provides the best evidence to date into the timing of how our early Milky Way came together, including the merger with a key satellite galaxy. Using relatively new methods in astronomy, the researchers were able to identify the most precise ages currently possible for a sample of about a hundred red giant stars in the galaxy.
  • May 17, 2021 4:47:06 PM
    One of the enduring mysteries of the COVID-19 pandemic is why most children tend to experience fewer symptoms than adults after infection with the coronavirus. The immune system response that occurs in the rare cases in which children experience life-threatening reactions after infection may offer an important insight, a new study suggests.
  • May 15, 2021 1:11:16 PM
    Inspired by nature, researchers have created a novel material capable of capturing light energy. This material provides a highly efficient artificial light-harvesting system with potential applications in photovoltaics and bioimaging.
  • May 14, 2021 5:42:22 PM
    A new study shows how engineered immune cells used in new cancer therapies can overcome physical barriers to allow a patient's own immune system to fight tumors. The research could improve cancer therapies in the future for millions of people worldwide.
  • May 14, 2021 5:42:13 PM
    Psychology researchers found that playing games in virtual reality creates an effect called 'time compression,' where time goes by faster than you think. The research team compared time perception during gameplay using conventional monitors and virtual reality to determine that this effect is uniquely linked to the virtual reality format.
  • May 14, 2021 5:42:05 PM
    Rodents and pigs share with certain aquatic organisms the ability to use their intestines for respiration, a new study finds. The researchers demonstrated that the delivery of oxygen gas or oxygenated liquid through the rectum provided vital rescue to two mammalian models of respiratory failure.
  • May 14, 2021 5:41:19 PM
    Climate change is exacerbating problems like habitat loss and temperatures swings that have already pushed many animal species to the brink. But can scientists predict which animals will be able to adapt and survive? Using genome sequencing, researchers show that some fish, like the threespine stickleback, can adapt very rapidly to extreme seasonal changes. Their findings could help scientists forecast the evolutionary future of these populations.
  • May 13, 2021 4:39:59 PM
    The Antarctic ice sheet was even more unstable in the past than previously thought, and at times possibly came close to collapse, new research suggests. The findings raise concerns that, in a warmer climate, exposing the land underneath the ice sheet as it retreats will increase rainfall on Antarctica, and this could trigger processes that accelerate further ice loss.
  • May 12, 2021 12:34:19 PM
    The property that makes fluorescent lights buzz could power a new generation of more efficient computing devices that store data with magnetic fields, rather than electricity.
  • May 6, 2021 6:20:39 PM
    The cerebellum -- a part of the brain once recognized mainly for its role in coordinating movement -- underwent evolutionary changes that may have contributed to human culture, language and tool use, according to a new study.