Researchers find a way to harness the entire spectrum of sunlight Scientists for the first time have developed a single molecule that can absorb sunlight efficiently and also act as a catalyst to transform solar energy into hydrogen, a clean alternative to fuel for things like gas-powered vehicles.
Mayfly populations falling fast in North America A team of researchers from the University of Oklahoma, Virginia Tech and the University of Notre Dame has found that populations of mayflies in parts of North America have fallen dramatically in recent years. In their paper published in the Proceedings of the National Academy of Sciences, the group describes using weather radar data to calculate mayfly populations and what they learned about them.
Insecticides becoming more toxic to honey bees During the past 20 years, insecticides applied to U.S. agricultural landscapes have become significantly more toxic—over 120-fold in some midwestern states—to honey bees when ingested, according to a team of researchers, who identified rising neonicotinoid seed treatments in corn and soy as the primary driver of this change. The study is the first to characterize the geographic patterns of insecticide toxicity to bees and reveal specific areas of the country where mitigation and conservation efforts could be focused.
Scientists create 3-D printed parts that can kill bacteria Researchers from the University of Sheffield have, for the first time, manufactured 3-D printed parts that show resistance to common bacteria. This could stop the spread of infections such as MRSA in hospitals and care homes, saving the lives of vulnerable patients.
Method triggers selective degradation of proteins for analysis Scientists of Ludwig-Maximilians-Universitaet (LMU) in Munich have developed a tool to eliminate essential proteins from cells with a flash of light. The new method makes it possible to study the function of essential proteins.
Trolley dilemma: When it's acceptable to sacrifice one person to save others is informed by culture Cultural differences play a pivotal role in how people in different parts of the world perceive when it is acceptable to sacrifice one person to save a larger group, new research has shown.
Scientists made a bow tie-shaped molecule and it changes colour A molecule shaped like a bow tie changes colour in the presence of toxic chemicals, which could make it useful for monitoring air
Watch the first ever video of a chemical bond breaking and forming A chemical bond between two metal atoms has been filmed breaking and forming for the first time – something scientists say they only dreamed of seeing
Focus: Detecting the Rotation of a Quantum Spin
Author(s): Philip Ball
Researchers detected the effect of rotating a crystal on the spin of an embedded particle, a result that could lead to ultrasensitive rotation sensors.
[Physics 13, 5] Published Fri Jan 17, 2020
Synopsis: Lightscape Traps Rydberg Atoms in the Dark
A holographic technique confines excited Rydberg atoms in the central dark region of a 3D light-intensity pattern.
[Physics] Published Thu Jan 16, 2020
Synopsis: A Catalog of High-Energy Gamma-Ray Sources
A high-altitude observatory has detected nine astrophysical sources emitting gamma rays with extremely high energies.
[Physics] Published Wed Jan 15, 2020
In the quantum realm, cause doesn’t necessarily come before effect In everyday life, causes always precede effects. But new experiments suggests that no such restriction applies in the quantum world
Strange particles found in Antarctica cannot be explained by physics A NASA science balloon picked up two high-energy particles and a new analysis reveals that they can't be explained by the standard model of particle physics
Synopsis: Two Lasers in One
A single semiconductor laser can produce both an amplitude-modulated and a frequency-modulated frequency comb, demonstrating a physical relationship between two types of output previously thought to be independent.
[Physics] Published Tue Jan 14, 2020
Synopsis: Superfluid Doughnut Spins at Supersonic Speeds
Researchers rev up a rotating Bose-Einstein condensate to beyond a critical speed, setting the stage for creating a giant superfluid vortex.
[Physics] Published Mon Jan 13, 2020
Synopsis: Directionally Sensitive Magnetoresistance
A new experiment shows that the semiconductor germanium exhibits unidirectional magnetoresistance, which had previously only been seen in more exotic materials.
[Physics] Published Mon Jan 13, 2020
Trippy maths program could help figure out the shape of the universe Mathematicians have come up with a way to explore strange 3D spaces that could be related to the shape of the universe
Focus: Catching Electrons as They Escape a Liquid
Author(s): Mark Buchanan
A new technique allows accurate measurements of electrons that escape a liquid surface—information that is essential for understanding chemical reactions in water droplets in the atmosphere.
[Physics 13, 4] Published Fri Jan 10, 2020
It would take Iran more than 4 months to develop nuclear weapons The US assassination of Iranian general Qassem Soleimani has raised fears of nuclear conflict, but Iran has been on the road to building nuclear weapons for some time
Metallic hydrogen would be the ultimate fuel - if we can make it The universe’s most common element could also be its most wondrous. Two different groups of researchers say they've made it - but can either claim withstand scrutiny?
Physicists beat Lorentz reciprocity for microwave transmission New device could boost telecommunications and be adapted for photonics
Japan’s SuperKEKB set for first particle collisions Revamped accelerator will soon be smashing electrons and positrons together
Wood-based 'supermaterial' is stronger and tougher than steel New material is made by compressing treated wood
Three photons bind together to make a ‘molecule’ of light Technique could be used to create quantum-information systems
Nuclear excitation by electron capture seen at long last Breakthrough could lead to new type of energy source
Pistachio trees 'talk' to their neighbours, reveals statistical physics Ising model could account for nut production of pistachio orchards
US National Science Foundation clamps down on misconduct Agency will now require every grantee organization to report cases of sexual harassment