feed info

155,131 articles from ScienceDaily

Webb, Hubble capture detailed views of DART impact

Two of NASA's Great Observatories, the James Webb Space Telescope and the Hubble Space Telescope, have captured views of a unique NASA experiment designed to intentionally smash a spacecraft into a small asteroid in the world's first-ever in-space test for planetary defense. These observations of NASA's Double Asteroid Redirection Test (DART) impact mark the first time that Webb and Hubble...

Observations confirm model predictions of sea-level change from Greenland melt

Rising sea levels from melting glaciers and ice sheets pose an increasing threat to coastal communities worldwide. A new analysis of high-resolution satellite observations takes a major step forward in assessing this risk by confirming theoretical predictions and computational models of sea-level changes used to forecast climate-change-driven impacts.

Sniffing out the brain's smelling power

Since their discovery over 100 years ago, neurons in the brain's olfactory bulb, called tufted cells, have been difficult to study. By leveraging new technology, neuroscientists were able to precisely dissect the neural activity of these tufted cells for the first time. They discovered the tufted cells were better at recognizing smells than mitral cells, their neighboring neurons in the olfactory...

Neural net computing in water

A team of researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have developed an ionic circuit comprising hundreds of ionic transistors and performed a core process of neural net computing.

Scientists find link between fast-melting Arctic ice and ocean acidification

An international team of researchers has found acidity levels increasing three to four times faster than ocean waters elsewhere and a strong correlation between the accelerated rate of melting ice in the region and the rate of ocean acidification. This threatens the Earth's climate and the survival of plants, shellfish, coral reefs and other marine life.


Potential first traces of the universe's earliest stars

Astronomers may have discovered the ancient chemical remains of the first stars to light up the Universe. Using an innovative analysis of a distant quasar observed by the 8.1-meter Gemini North telescope on Hawai'i, the scientists found an unusual ratio of elements that, they argue, could only come from the debris produced by the all-consuming explosion of a 300-solar-mass first-generation star.

Seeing antibiotics in action inside a pathogenic bacterium

New research shows at atomic detail how antibiotics affect the process of protein production inside bacteria. The study uses cryo-electron tomography to observe the dynamics of the translation machinery in Mycoplasma pneumoniae, tiny parasitic bacteria that cause atypical pneumonia in humans.

Can gold mining be more sustainable?

A study details the severe degradation and deforestation caused by gold mining in tropical forests, as well as the biophysical challenges associated with effectively restoring these landscapes.

Robotic drug capsule can deliver drugs to gut

A new drug capsule can help large proteins such as insulin and small-molecule drugs be absorbed in the digestive tract. The capsule has a robotic cap that spins and tunnels through the mucus barrier when it reaches the small intestine, allowing drugs carried by the capsule to pass into cells lining the intestine.

New PET tracer shows promise for uPAR-targeted therapy of neuroendocrine neoplasms

A novel PET radiotracer can accurately assess the presence of a biomarker that indicates the level of tumor aggressiveness in neuroendocrine neoplasms (NENs). According to new research, the detection of the biomarker provides useful information for physicians to provide personalized care for patients with NENs and may also serve as a potential target for peptide radionuclide therapy (PRRT) for NEN...

System to create bioplastics

A team of scientists has developed a system that uses carbon dioxide, CO2, to produce biodegradable plastics, or bioplastics, that could replace the nondegradable plastics used today. The research addresses two challenges: the accumulation of nondegradable plastics and the remediation of greenhouse gas emissions.

Extreme nonlinear wave group dynamics in directional wave states

Deep-water wave groups are known to be unstable and become rogue. Such unstable wave groups propagate independently regardless of interference. Results seem to support the concept of an unperturbed nonlinear water wave group focusing in the presence of counter-propagating waves, suggesting wave states are directional.

Myotonic dystrophy: GABA receptors implicated in sleepiness, via mouse model

People with the inherited disorder myotonic dystrophy (DM) often experience excessive daytime sleepiness and fatigue, as well as altered responses to anesthetics that can put them at risk for complications when hospitalized. Researchers now have evidence from a mouse model of DM's central nervous system symptoms, indicating a link to the inhibitor neurotransmitter GABA -- and a potential...

Keeping cool: A common refrigerant shows promise for metal recycling

It's not uncommon in the scientific world for a process to have many unique applications. Researchers have taken a water treatment technology and adapted it for another environmentally important function -- selectively separating rare earth elements and transition metals. This chemical process significantly reduces both the energy and product consumption involved with rare earth element recovery.

Less bird diversity in city forests

A new study shows that cities negatively affect the diversity of birds. There are significantly fewer bird species in urban forests compared with forests in the countryside -- even if the forest areas are of the same quality.

New light for shaping electron beams

A new technique that combines electron microscopy and laser technology enables programmable, arbitrary shaping of electron beams. It can potentially be used for optimizing electron optics and for adaptive electron microscopy, maximizing sensitivity while minimizing beam-induced damage.

Hackmanite mineral changes color also upon exposure to nuclear radiation

Researchers have long studied the color-changing properties of the natural mineral hackmanite upon exposure to UV radiation or X-rays. Now, the research group studied the reactions of synthetic hackmanite to nuclear radiation. The researchers discovered a one-of-a-kind and novel intelligent quality, gamma exposure memory, which allows the use of hackmanite as e.g. radiation detector.