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229,466 articles from PhysOrg

Fresh concerns for wetland springs

New research led by Flinders University is renewing calls to protect the source of water and aquifers supporting the ecologically significant Doongmabulla Springs Complex in central Queensland from a proposed Carmichael coal mine in the Galilee Basin.

Ultrafast optical switching can save overwhelmed datacenters

EPFL and Microsoft Research scientists demonstrated ultrafast optical circuit switching using a chip-based soliton comb laser and a completely passive diffraction grating device. This particular architecture could enable an energy-efficient optical datacenter to meet enormous data bandwidth requirements in future.

Which animals can catch the coronavirus?

On Oct. 6, the U.S. Department of Agriculture's National Veterinary Services Laboratories announced confirmation of SARS-CoV-2—the virus that causes COVID-19—in two previously uninfected animal species at a zoo in Illinois. Dr. Leyi Wang, a virologist and professor of veterinary medicine at the University of Illinois Urbana-Champaign, first tested the samples in the university's Veterinary...

Deciphering the mysteries of enigmatic fungi

Few things alive on Earth occupy as little of our brain space as fungi. The vast majority of these organisms—neither plant nor animal—are invisibly small or perpetually hidden underneath our feet. Only when mushrooms breach the soil can we even see them.

Plankton may head poleward as a result of global warming

Ocean warming caused by anthropogenic greenhouse-gas emissions will prompt many species of marine plankton to seek out new habitats, in some cases as a matter of survival. ETH Zurich researchers expect many organisms to head to the poles and form new communities—with unforeseeable consequences for marine food webs.

Plant-eating lizards on the cusp of tooth evolution

Researchers at the Universities of Helsinki and Lyon and the Geological Survey of Finland found that complex teeth, a hallmark of mammals, also evolved several times in reptiles, prompting the evolutionary success of plant-eating lizards. However, contrary to mammals their tooth evolution was not unidirectional.

Synthetic biology moves into the realm of the unnatural

The field of synthetic biology has had great success engineering yeast and bacteria to make chemicals—biofuels, pharmaceuticals, fragrances, even the hoppy flavors of beer—cheaply and more sustainably, with only sugar as the energy source.

Making progress towards quantum technologies based on magnetic molecules

An international research team, with the participation of the Institute of Molecular Science (ICMol) of the University of Valencia, has achieved spin-electric control in molecular nanomagnets. This fact offers great advantages when preparing quantum devices based on magnetic molecules. The work has been published in the journal Nature Physics.

Sea otter populations found to increase eelgrass genetic diversity

A team of researchers affiliated with a host of institutions in Canada and one in the U.S. has found that eelgrass genetic diversity increases when sea otters live in eelgrass meadows. In their paper published in the journal Science, the group describes their study of eelgrass meadows under different conditions. Joe Roman, with the University of Vermont, has published a Perspectives piece in the...

The photoelectric properties of MAPbI3

Organic-inorganic hybrid perovskites (OIHPs) are promising in photovoltaic energy harvesting, electro-optic detection, and all-optical conversion. Understanding the atomic structure and structural instability of OIHPs is the key to appreciate their remarkable photoelectric properties.

Mechanism and evolution process of supercritical fluid

Fluids are like the "blood" inside the solid Earth, playing an important role in the transportation of matter and energy. Due to the compositional difference, rocks that composed mainly of silicate and common fluids have a typically low level of miscibility.

What will happen to baobab trees in Madagascar in the future?

Madagascar is an important world conservation "hot spot" that supports a large number of endemic species. It is home to six endemic baobab species, the most remarkable trees in Africa. What will be the effect of global climate change to these ecological keystone species in Madagascar?

Unifying models of chorus wave frequency chirping

Whistler mode chorus waves are electromagnetic emissions common in planetary magnetospheres. Among other impacts, their scattering of magnetospheric electrons is one driver for the formation of auroras. An important attribute of these waves is frequency chirping, in which the frequency of the emission rises or falls nearly monotonically with time.

Unlined waste disposal pits endanger groundwater in San Joaquin Valley

A new study by the energy science and policy research institute, Physicians, Scientists, and Engineers (PSE) for Healthy Energy shows that the disposal of over 16 billion barrels of oil and gas wastewater into unlined pits over a 50-year period has introduced salts, carcinogens, and other toxins into regional aquifers.

Researchers propose new strategy for interfacial modification of organic solar cells

Surface energy (γs) plays a key role in the formation of bulk-heterojunction (BHJ) films in organic solar cells fabricated by solution process. The miscibility of BHJ films can be predicted by the difference of surface energy between donor and acceptor. The vertical distribution and the stacking orientation of BHJ films can be regulated by the surface energy in the bottom interface layer. The...