First discovery in United States of colistin resistance in a human E. coli infection

The Multidrug Resistant Organism Repository and Surveillance Network (MRSN) at the Walter Reed Army Institute of Research (WRAIR) characterized a transferrable gene for colistin resistance in the United States that may herald the emergence of truly pan-drug resistant bacteria.

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Fungi -- a promising source of chemical diversity

Breadseed poppies <i>Papaver somniferum</i> as well as many other poppy and barberry plants produce many Isochinoline alkaloids.The fungus Aspergillus fumigatus produces a group of previously unknown natural products. With reference to plant isoquinoline alkaloids, these substances have been named fumisoquins. Researchers from Jena (Germany) discovered the...

How a huge landslide shaped Zion National Park

This view of Zion Canyon in Utah's Zion National Park shows the flat valley floor created when part of the peak named the Sentinel collapsed in a gigantic landslide, creating a dam and forming a lake, which eventually filled in with sediment. A new University of Utah study provides the first direct date for the landslide, determining it happened 4,800 years ago and showing it was so large that it would have covered New York City's Central Park with 275 feet of debris. This photo is the cover image for the June issue of the Geological Society America's journal <i>GSA Today</i>, which is publishing the Utah study.A Utah mountainside collapsed 4,800 years ago in a gargantuan landslide known as a "rock avalanche," creating the flat floor of what is now Zion National Park by damming the...

Why is there no Labor Party in the United States?

The improbable rise of Bernie Sanders' presidential campaign presents an interesting question: why is Sanders, a self-proclaimed "democratic socialist," running as a Democrat? McGill University sociologist Barry Eidlin examines...

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Migration back to Africa took place during the Paleolithic

The complete mitogenome of Pestera Muierii woman has been retrieved.The Palaeogenomics study conducted by the Human Evolutionary Biology group of the Faculty of Science and Technology, led by Concepción de la Rua, in collaboration with researchers in Sweden, the...

Targeting metals to fight pathogenic bacteria

Felipe Cava, associate professor, at The Laboratory for Molecular Infection Medicine Sweden (MIMS), Ume&aring; University in Sweden.Researchers at the Laboratory for Molecular Infection Medicine Sweden (MIMS) at Umeå University in Sweden participated in the discovery of a unique system of acquisition of essential metals in the...

Cuing environmental responses in fungi

Fungi can sense environmental signals and react accordingly, changing their development, direction of growth, and metabolism. Sensory perception lies at the heart of adaptation to changing conditions, and helps fungi...

Researchers identify critical factors that determine drought vulnerability of wheat, maize

Researchers led by Lixin Wang, assistant professor of earth sciences in the School of Science at Indiana University-Purdue University Indianapolis, have identified critical information about the environmental variables and agronomic...

Scientists illuminate a hidden regulator in gene transcription

MIT scientists developed a super-resolution imaging technique, using a combination of multi-colored lasers and mirrors, to visualize very tiny, transient phenomena, such as enzyme clustering on genes.Gene transcription is the process by which DNA is copied and synthesized as messenger RNA (mRNA) -- which delivers its genetic blueprints to the cell's protein-making machinery.

Why fruit fly sperm are giant

These are mating <i>Drosophila</i> fruit flies.In the animal kingdom, sperm usually are considerably smaller than eggs, which means that males can produce far more of them. Large numbers of tiny sperm can increase the probability...

Supermassive black hole wind can stop new stars from forming

This is an artist's rendition of the galaxies Akira (right) and Tetsuo (left) in action. Akira's gravity pulls Tetsuo's gas into its central supermassive black hole, fueling winds that have the power to heat Akira's gas. Because of the action of the black hole winds, Tetsuo's donated gas is rendered inert, preventing a new cycle of star formation in Akira.Scientists have uncovered a new class of galaxies with supermassive black hole winds that are energetic enough to suppress future star formation.

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This is a reconstruction of the 15 million year old Malleodectes from Riversleigh chomping down on what appears to have been its favourite food -- snails. The massive, shell-cracking premolar tooth is clearly visible in the open mouth.

Doubling down on Schrödinger's cat

Yale physicists have given Schr&ouml;dinger's cat a second box to play in.Yale physicists have given Schrödinger's famous cat a second box to play in, and the result may help further the quest for reliable quantum computing.

SwRI scientists discover evidence of ice age at martian north pole

Using radar data collected by NASA's Mars Reconnaissance Orbiter, a Southwest Research Institute-led team found evidence of an ice age recorded in the polar deposits of Mars. Ice ages on...

Engineers discover a new gatekeeper for light

A photograph (left) shows the experimental set-up used to confirm the existence of the Bloch wave resonance, which was first predicted theoretically. An illustration (right) shows the interior of the experimental device, called a hollow periodic waveguide, which consists of two corrugated metallic plates separated by a variable distance of about one inch, and the upper plate can slide with respect to the lower. When researchers shot microwaves between the plates through the air, they were able to control which wavelengths of microwaves were allowed through by varying the position of the upper plate.Imagine a device that is selectively transparent to various wavelengths of light at one moment, and opaque to them the next, following a minute adjustment.

Antarctic fossils reveal creatures weren't safer in the south during dinosaur extinction

A painted reconstruction of typical Cretaceous marine environment in Antarctica, including the paperclip-shaped 'heteromorph' <i>ammonite Diplomoceras</i>.A study of more than 6,000 marine fossils from the Antarctic shows that the mass extinction event that killed the dinosaurs was sudden and just as deadly to life in...

Spring snow a no-go?

This is Sundial Peak, in the Wasatch Mountains, with Lake Blanche (elevation 8920 feet, 2718 meters) in the foreground, May 2016.Spring snowpack, relied on by ski resorts and water managers throughout the Western United States, may be more vulnerable to a warming climate in coming decades, according to a new...

Women may be able to reduce breast cancer risk predicted by their genes

Women with a high risk of developing breast cancer based on family history and genetic risk can still reduce the chance they will develop the disease in their lifetimes by...

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Small offshore oil spills put seabirds at risk: Industry self-monitoring failing

This is an Oiled Thick-billed Murre, Cripple Cove (near Cape Race), Newfoundland November 28, 2004.Seabirds exposed to even a dime-sized amount of oil can die of hypothermia in cold-water regions, but despite repeated requests by Environment Canada, offshore oil operators are failing when it...

Finding a new formula for concrete

Researchers at MIT are seeking to redesign concrete -- the most widely used human-made material in the world -- by following nature's blueprints.

New malaria drugs kill by promoting premature parasite division

Massive morphological changes resembling premature onset of parasite division in malaria parasites after two-hour exposure to new antimalarial drugs.Several new malaria drugs under development share a common feature: they promote an influx of sodium ions into Plasmodium parasites that have invaded red blood cells and multiply there. A...

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Fort McMurray fires cause air quality issues

This is an Aqua image of Ft. McMurray fires from May 24, 2016.The air quality around the entire Fort McMurray region remains very poor. The Alberta Health Services has issued warnings for the entire area with Health Quality Index of 10+...

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