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40 articles from ScienceDaily

COVID-19 outbreak lasts days longer for each day's delay in social distancing

A new analysis of COVID-19 outbreaks in 58 cities has found that places that took longer to begin implementing social distancing measures spent more time with the virus rapidly spreading than others that acted more quickly. Epidemiological researchers have published research finding every day a city delayed implementing social distancing measures after the appearance of a first case added 2.4 days...

Tracking fossil fuel emissions with carbon-14

Researchers have devised a breakthrough method for estimating national emissions of carbon dioxide from fossil fuels using ambient air samples and a well-known isotope of carbon that scientists have relied on for decades to date archaeological sites.

A boost for cancer immunotherapy

MIT engineers have found a way to boost the effectiveness of cancer immunotherapy drugs called checkpoint inhibitors. They showed that if they treated mice with these drugs along with new nanoparticles that stimulate the immune system, the therapy became more powerful than checkpoint inhibitors given alone.

Loss of land-based vertebrates is accelerating

Analysis of thousands of vertebrate species reveals that extinction rates are likely much faster than previously thought. The researchers call for immediate global action, such as a ban on the wildlife trade, to slow the sixth mass extinction.

New biosensor visualizes stress in living plant cells in real time

Plant biologists have developed a new nanosensor that monitors foundational mechanisms related to stress and drought. The new biosensor allows researchers to analyze changes in real time as they happen involving kinases, enzymes that catalyze key biological activities in proteins. Certain kinases are essential since they are known to be activated in response to drought conditions, triggering the...

Across the cell membrane

Aquaporins and glucose transporters facilitate the movement of substances across biological membranes and are present in all kingdoms of life.Biophysicists used a supercomputer to explore the atomic behavior of these proteins. The research suggests glucose transporters function by using a gate on the extracellular side that opens and closes based on body temperature.

Warmer temperatures slow COVID-19 transmission, but not by much

Researchers looked at the impact of temperature, precipitation, and UV index on COVID-19 case rates in the United States during the spring months of 2020. The findings reveal that while the rate of COVID-19 incidence does decrease with warmer temperatures up until 52 degrees F, further warmer temperatures do not decrease disease transmission significantly.

COVID-19 could be a seasonal illness with higher risk in winter

A study conducted in Sydney, Australia, during the early epidemic stage of COVID-19 has found an association between lower humidity and an increase in locally acquired positive cases. Researchers discovered a 1 percent decrease in humidity could increase the number of COVID-19 cases by 6 percent.

How Americans are coping with COVID-19 stress

Almost overnight, the rapid emergence of the COVID-19 pandemic in the United States and subsequent state and federal prevention measures dramatically altered daily behavior. A new study provides the first snapshot of the immediate impact of COVID-19 on Americans' stress levels, coping strategies, and adherence to public health guidelines.

The cascade to criticality

Combined theoretical and experimental work unveils a novel mechanism through which criticality emerges in quasiperiodic structures -- a finding that provides unique insight into the physics on the middle ground between order and disorder.

Kirigami grips could help seniors keep their footing

You've never seen a pair of snake skin shoes like this before. Researchers have developed pop-up shoe grips, inspired by snake skin, that can increase friction between the shoe and the ground. The assistive grips could be used, among other things, to reduce the risk of falling among older adults.

A new type of matter discovered inside neutron stars

A research group has found strong evidence for the presence of exotic quark matter inside the cores of the largest neutron stars in existence. The conclusion was reached by combining recent results from theoretical particle and nuclear physics to measurements of gravitational waves from neutron star collisions.

Hot stars are plagued by giant magnetic spots, ESO data shows

Astronomers have discovered giant spots on the surface of extremely hot stars hidden in stellar clusters. Not only are these stars plagued by magnetic spots, some also experience superflare events, explosions of energy several million times more energetic than similar eruptions on the Sun. The findings help astronomers better understand these puzzling stars and open doors to resolving other...