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Solar cells printed like wallpaper.

Solar cells might one day be produced by the roll, as cheaply and easily as wallpaper. Scientists in Arizona are using screen-printing, a technique developed for patterning fabrics, to produce plastic solar cells 1 .

The technique is another step towards the general availability of solar power from flexible devices on plastic sheets or glass panels. The basic materials of a photovoltaic cell are inexpensive, but combining t

Genes show seasonal trends

Mosquitoes’ evolve rapidly in response to global warming.

Mosquitoes are holing up later as winters get warmer, US ecologists have shown. This is the first genetic adaptation to global warming to be identified. Less flexible animals could face extinction, they warn.

The North American mosquito Wyeomyia smithii uses shortening day length to judge when to bed down for the winter. Modern mozzies wait nine days more than their ancestors did in 1972, William Bradshaw and Christin

Gold Nanowires Grow on Their Own

Scientists can coax tiny metal particles to self-assemble into microscopic wires that conduct electricity and repair themselves, new research reveals. Kevin D. Hermanson of the University of Delaware and his colleagues, who published their finding in the current issue of Science, suggest that such nanowires may prove useful for wet electronic and bioelectric circuits.

The researchers placed particles of gold ranging in diameter from 15 to 30 nanometers in a fluid suspension within a thin ch

Salt holds samples of ancient seas

Water trapped for millions of years gives a glimpse of oceans’ turbulent past.

Drops of sea water entombed within salt crystals millions of years ago are giving researchers a glimpse of ancient oceans. The water, trapped during evaporation, reveals that the seas have seen large chemical changes during their history.

“The consensus had been that sea-water chemistry hadn’t changed that much over the past 600 million years,” says geochemist Juske Horita of Oak Ridge National La

Massive Black Hole’s Missing Ring of Dust Baffles Astronomers

Some galaxies may have torus envy, if a new study is any indication. The most sensitive imaging yet of nearby galaxy M87’s core reveals that the black hole residing there has either a nonexistent or much fainter ring of dust around it compared with its peers. Scientists had thought that these rings were key features of such highly energetic galaxies. The puzzling finding appears today in the Astrophysical Journal Letters .

The current model of active galaxies such as M87 posits that

Researchers Reconstruct the Rise of the Woolly Mammoth

Examine any depiction of Ice Age life and you’re likely to find at least one—a woolly mammoth, that is. But popular appeal notwithstanding, the evolutionary history of this prehistoric beast has proved somewhat difficult to pin down. To that end, findings published today in the journal Science provide some much needed insight.

Working from an extensive Eurasian fossil record going back some 2.6 million years, Adrian Lister of University College London and Andrei V. Sher of the Russian Acad

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Physics and Astronomy

New insights into broken symmetries

The Lorentz reciprocal theorem can now be applied to fluids with broken symmetries. Scientists at the Max Planck Institute for Dynamics and Self-Organization (MPI-DS) in Göttingen have found a way…

Extreme stars share unique properties

…that may provide a link to mysterious sources. An international research team led by Michael Kramer and Kuo Liu from the Max Planck Institute for Radio Astronomy in Bonn, Germany,…

Telescope Array detects second highest-energy cosmic ray ever

Second only to the Oh-My-God particle, the newly dubbed Amaterasu particle deepens the mystery of the origin, propagation and particle physics of rare, ultra-high-energy cosmic rays. In 1991, the University…

Life Sciences and Chemistry

When growth becomes a weakness

Growth is a fundamental biological process and a prerequisite for living organisms to develop and reproduce. The processes of cell growth (i.e. the production of new biomass) and of cell…

Heart repair via neuroimmune crosstalk

Unlike humans, zebrafish can completely regenerate their hearts after injury. They owe this ability to the interaction between their nervous and immune systems, as researchers led by Suphansa Sawamiphak from…

New design for rechargeable hydrogen−chlorine battery

…in wide temperature range. A research team led by Prof. CHEN Wei from the University of Science and Technology of China (USTC) of the Chinese Academy of Science (CAS) designed…

Materials Sciences

New study shows how heat can be used in computing

Physicists at Martin Luther University Halle-Wittenberg (MLU) and Central South University in China have demonstrated that, combining specific materials, heat in technical devices can be used in computing. Their discovery…

Hybrid transistors set stage for integration of biology and microelectronics

Microprocessor-scale transistors detect and respond to biological states and the environment. Your phone may have more than 15 billion tiny transistors packed into its microprocessor chips. The transistors are made…

Discovery of structural regularity hidden in silica glass

Glass – whether used to insulate our homes or as the screens in our computers and smartphones – is a fundamental material. Yet, despite its long usage throughout human history,…

Information Technology

Single ions in nano-sized particles

A new platform for quantum information processing. Processing quantum information relies on interacting qubits – the basic building blocks of quantum information – to perform computational tasks. Scientists are searching…

New computer code for mechanics of tissues and cells in three dimensions

Open-source supercomputer algorithm predicts patterning and dynamics of living materials and enables studying their behavior in space and time. Biological materials are made of individual components, including tiny motors that…

ccelerating the phase identification of multiphase mixtures with deep learning

Researchers develop a deep learning model that can detect a previously unknown quasicrystalline phase present in multiphase crystalline samples. Crystalline materials are made up of atoms, ions, or molecules arranged…