Agregador de canales de noticias

Why Time Feels So Weird in 2020

Slashdot - Science - Hace 6 horas 42 mins
Some days seem to pass very slowly while some weeks, and even months, fly by. A set of simple perception tests illustrate some factors that can distort our sense of time.

Read more of this story at Slashdot.

Making a list of all creatures, great and small

Science Daily - Hace 7 horas 17 mins
A new article outlines a roadmap for creating, for the first time, an agreed list of all the world's species, from mammals and birds to plants, fungi and microbes.

Risk of airborne coronavirus spread being underplayed, say researchers

New Scientist - Hace 8 horas 26 mins
Over 200 scientists have signed a letter calling for the world to recognise the potential for the coronavirus to be transmitted through small airborne droplets, and to take steps to protect against them

Covid-19 news: Everyone should wear face coverings, says Royal Society

New Scientist - Hace 8 horas 26 mins
The latest coronavirus news updated every day including coronavirus cases, the latest news, features and interviews from New Scientist and essential information about the covid-19 pandemic

Brazil President Jair Bolsonaro Tests Positive for Covid-19 After Months of Dismissing the Seriousness of the Virus

Slashdot - Science - Hace 8 horas 41 mins
Brazilian President Jair Bolsonaro has tested positive for Covid-19, following months of downplaying the virus. From a report: Bolsonaro himself announced the result, speaking on Brazilian TV channels Tuesday. "Everyone knew that it would reach a considerable part of the population sooner or later. It was positive for me," he said, referring to the Covid-19 test he took Monday. "On Sunday, I wasn't feeling very well. On Monday, it got worse when I started feeling tired and some muscle pain. I also had a 38-degree [Celsius] fever. Given those symptoms, the presidential doctor said there was suspicion of Covid-19," Bolsonaro said, adding that he then went to hospital where scans of his lungs "came back clean." Earlier on Tuesday, Bolsonaro told CNN affiliate CNN Brasil that he had been treated with hydroxychloroquine and azithromycin as he awaited the result of his fourth Covid-19 test in four months. Hydroxychloroquine, though enthusiastically boosted by both Bolsonaro and US President Donald Trump, has not been proven as an effective treatment for Covid-19. Bolsonaro nevertheless credited the controversial antimalarial drug for his well-being on Tuesday. "I am feeling very well. I believe that the way they administered the hydroxychloroquine on, the effect was immediate," he said.

Read more of this story at Slashdot.

Why hasn't the UK seen a second wave of the coronavirus?

New Scientist - Hace 9 horas 18 mins
Scientists have repeatedly warned of a second surge of covid-19 infections as restrictions ease in the UK, but it hasn’t happened – were they wrong or is it still to come?

Our animal inheritance: Humans perk up their ears, too, when they hear interesting sounds

Science Daily - Hace 9 horas 53 mins
Many animals move their ears to better focus their attention on a novel sound. That humans also have this capability was not known until now. A research team now has demonstrated that we make minute, unconscious movements of our ears that are directed towards the sound want to focus our attention on. The team discovered this ability by measuring electrical signals in the muscles of the vestigial motor system in the human ear.

Desk-based jobs may offer protection against poor cognition in later life

Science Daily - Hace 9 horas 53 mins
People who work in jobs that require less physical activity - typically office and desk-based jobs - are at a lower risk of subsequent poor cognition than those whose work is more physically active, suggests new research.

1.5 billion people will depend on water from mountains

Science Daily - Hace 9 horas 53 mins
Global water consumption has increased almost fourfold in the past 100 years, and many regions can only meet their water demand thanks to essential contributions from mountain regions. In 30 years, almost a quarter of the world's lowland population will strongly depend on runoff from the mountains. Only sustainable development can ensure the important function of mountain areas as Earth's ''water towers''.

Agriculture - a climate villain? Maybe not!

Science Daily - Hace 9 horas 53 mins
The UN's Intergovernmental Panel on Climate Change (IPCC) claims that agriculture is one of the main sources of greenhouse gases, and is thus by many observers considered as a climate villain.

Dopamine neurons mull over your options

Science Daily - Hace 9 horas 53 mins
Researchers have found that dopamine neurons in the brain can represent the decision-making process when making economic choices. As monkeys contemplated whether or not to choose an item, a subset of dopamine neurons transitioned from indicating the item's value to indicating the monkey's ultimate decision. Encoding of the decision into these dopamine neurons happened earlier than it did in other parts of the brain related to economic decision-making.

Excitation of robust materials

Science Daily - Hace 9 horas 53 mins
So-called topological materials have special electronic properties, which are very robust against external perturbations. In tungsten ditelluride such a topologically protected state can be ''broken up'' using special laser pulses within picoseconds and thus change its properties. This could be a key requirement for realising extremely fast, optoelectronic switches. For the first time, physicists observed changes to the electronic properties of this material in experiments in real-time.

Women's egg quality dependent on metabolic factors

Science Daily - Hace 9 horas 53 mins
Increasing the levels of a chemical found in all human cells could boost a woman's fertility and help select the best eggs for IVF.

Limitations of super-resolution microscopy overcome

Science Daily - Hace 9 horas 53 mins
The smallest cell structures can now be imaged even better: The combination of two microscopy methods makes fluorescence imaging with molecular resolution possible for the first time.

Scientists create new device to light up the way for quantum technologies

Science Daily - Hace 9 horas 53 mins
Researchers have created an innovative new device that will emit single particles of light, or photons, from quantum dots that are the key to practical quantum computers, quantum communications, and other quantum devices.

Interplay of impact, moral goals influences charitable giving to different causes

Science Daily - Hace 9 horas 54 mins
With the rise of globalization, geographic borders are becoming less relevant for making charitable donations, which means nonprofits and charities can make more effective pitches to donors by emphasizing higher-level concepts such as morality and idealistic values, said Carlos Torelli, a professor of business administration and the James F. Towey Faculty Fellow at Illinois.

Flu in early life determines our susceptibility to future infections

Science Daily - Hace 9 horas 54 mins
Early infections of influenza A can help predict how the virus will affect people across different ages in the future and could impact the effectiveness of flu vaccines, says a new study.

Engineered killer immune cells target tumors and their immunosuppressive allies

Science Daily - Hace 9 horas 54 mins
Scientists have engineered natural killer immune cells that not only kill head and neck tumor cells in mice but also reduce the immune-suppressing myeloid cells that allow tumors to evade the immune response.

Brain structural elements in psychiatric disorders

Science Daily - Hace 9 horas 54 mins
While researchers have previously identified brain structural signatures associated with individual neurological diseases using techniques such as magnetic resonance imaging (MRI), a team of scientists has now compared data from multiple studies to find brain structural abnormalities shared between four different neuropsychiatric conditions. The researchers also found brain signatures that were unique to individual conditions.

Microscopic structures could improve perovskite solar cells

Science Daily - Hace 9 horas 54 mins
Solar cells based on perovskite compounds could soon make electricity generation from sunlight even more efficient and cheaper. The laboratory efficiency of these perovskite solar cells already exceeds that of the well-known silicon solar cells. An international team has found microscopic structures in perovskite crystals that can guide the charge transport in the solar cell. Clever alignment of these electron highways could make perovskite solar cells even more powerful.


Suscribirse a Erick Castellanos sindicador