ScienceDaily: Top Technology News

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• NASA Mars weathercam helps find big new crater
• NASA's WISE findings poke hole in black hole 'doughnut' theory
• New 'T-ray' tech converts light to sound for weapons detection, medical imaging
• Not all diamonds are forever: Researchers see nanodiamonds created in coal fade away in seconds
• New details on microtubules and how the anti-cancer drug Taxol works
• Computer models helping unravel the science of life? How cells of the fruit fly react to changes in the environment
• Safe alternatives to BPA: New technology may help identify
• Putting a number on opinion dynamics in a population
• Screening for autism: There's an app for that
• Drug-target database lets researchers match old drugs to new uses
• Medical students may benefit from social media guidance
• Fossil avatars are transforming palaeontology
• First broadband wireless connection ... to the moon: Record-shattering Earth-to-Moon uplink
• Atomic-level protection for drivers
• Bending helps to control nanomaterials
• Liquid crystal as lubricant

NASA Mars weathercam helps find big new crater Posted: 22 May 2014 01:29 PM PDT Researchers have discovered on the Red Planet the largest fresh meteor-impact crater ever firmly documented with before-and-after images. The images were captured by NASA's Mars Reconnaissance Orbiter. The crater spans half the length of a football field and first appeared in March 2012. The impact that created it likely was preceded by an explosion in the Martian sky caused by intense friction between an incoming asteroid and the planet's atmosphere.

NASA's WISE findings poke hole in black hole 'doughnut' theory Posted: 22 May 2014 01:23 PM PDT A survey of more than 170,000 supermassive black holes, using NASA's Wide-field Infrared Survey Explorer (WISE), has astronomers reexamining a decades-old theory about the varying appearances of these interstellar objects. The unified theory of active, supermassive black holes, first developed in the late 1970s, was created to explain why black holes, though similar in nature, can look completely different. Some appear to be shrouded in dust, while others are exposed and easy to see.

New 'T-ray' tech converts light to sound for weapons detection, medical imaging Posted: 22 May 2014 12:05 PM PDT A device that essentially listens for light waves could help open up the last frontier of the electromagnetic spectrum -- the terahertz range. So-called T-rays, which are light waves too long for human eyes to see, could help airport security guards find chemical and other weapons. They might let doctors image body tissues with less damage to healthy areas. And they could give astronomers new tools to study planets in other solar systems. Those are just a few possible applications.

Not all diamonds are forever: Researchers see nanodiamonds created in coal fade away in seconds Posted: 22 May 2014 11:14 AM PDT Scientists show that some diamonds are not forever. Through the creation of nanodiamonds in treated coal scientists also show that some microscopic diamonds only last seconds before fading back into less-structured forms of carbon under the impact of an electron beam.

New details on microtubules and how the anti-cancer drug Taxol works Posted: 22 May 2014 10:34 AM PDT Images of microtubule assembly and disassembly have been produced by researchers at the unprecedented resolution of 5 angstroms, providing new insight into the success of the anti-cancer drug Taxol and pointing the way to possible improvements. "This is the first experimental demonstration of the link between nucleotide state and tubulin conformation within the microtubules and, by extension, the relationship between tubulin conformation and the transition from assembled to disassembled microtubule structure," says a biophysicist on the study.

Computer models helping unravel the science of life? How cells of the fruit fly react to changes in the environment Posted: 22 May 2014 09:35 AM PDT Scientists have developed a sophisticated computer modelling simulation to explore how cells of the fruit fly react to changes in the environment. The model shows how cells of the fruit fly communicate with each other during its development.

Safe alternatives to BPA: New technology may help identify Posted: 22 May 2014 09:34 AM PDT Numerous studies have linked exposure to bisphenol A (BPA) in plastic, receipt paper, toys, and other products with various health problems from poor growth to cancer, and the FDA has been supporting efforts to find and use alternatives. But are these alternatives safer? Researchers have developed new tests that can classify such compounds' activity with great detail and speed. The advance could offer a fast and cost-effective way to identify safe replacements for BPA.

Putting a number on opinion dynamics in a population Posted: 22 May 2014 08:58 AM PDT Opinion formation in a large population is influenced by both endogenous factors, such as interaction with one's peers, as well as exogenous factors, such as the media. In a recent paper, authors use a mathematical model to study the process of information assimilation in a population resulting from such exogenous inputs.

Screening for autism: There's an app for that Posted: 22 May 2014 08:57 AM PDT Software to help interpret videotaped behaviors of infants during autism screening tests has been developed by researchers. The program's accuracy proved equal to autism experts and better than both non-expert medical clinicians and students in training. "The great benefit of the video and software is for general practitioners who do not have the trained eye to look for subtle early warning signs of autism," said one researcher involved in the study.

Drug-target database lets researchers match old drugs to new uses Posted: 22 May 2014 07:51 AM PDT There are thousands of drugs that silence many thousands of cancer-causing genetic abnormalities. Some of these drugs are in use now, but many of these drugs are sitting on shelves or could be used beyond the disease for which they were originally approved. Repurposing these drugs depends on matching drugs to targets. A study recently published describes a new database and pattern-matching algorithm that allows researchers to evaluate rational drugs and drug combinations, and also recommends a new drug combination to treat drug-resistant non-small cell lung cancer.

Medical students may benefit from social media guidance Posted: 22 May 2014 07:51 AM PDT Medical students use social media extensively, but medical schools may need to offer more guidance in potential pitfalls, according researchers. "We assessed how medical students engage with social media platforms like Facebook and found that they have a pretty sophisticated understanding of its risks and benefits," said one researcher. Two reports outline findings from a survey of 2,109 medical students.

Fossil avatars are transforming palaeontology Posted: 22 May 2014 07:51 AM PDT New techniques for visualizing fossils are transforming our understanding of evolutionary history. Palaeontology has traditionally proceeded slowly, with individual scientists labouring for years or even decades over the interpretation of single fossils. The introduction of X-ray tomography has revolutionized the way that fossils are studied, allowing them to be virtually extracted from the rock in a fraction of the time necessary to prepare specimens by hand and without the risk of damaging the fossil.

First broadband wireless connection ... to the moon: Record-shattering Earth-to-Moon uplink Posted: 22 May 2014 07:49 AM PDT Scientists have prepared new details and the first comprehensive overview of the on-orbit performance of their record-shattering laser-based communication uplink between the moon and Earth, which beat the previous record transmission speed last fall by a factor of 4,800.

Atomic-level protection for drivers Posted: 22 May 2014 04:44 AM PDT A new window on the world of atoms will make future vehicles safer in collisions. Scientists have set out on an unusual journey – into the interior of certain materials. They are about to build a mathematical model of tiny but vital zones in aluminum vehicle bumper systems. The research group will use this virtual "mini-laboratory" to study the chaos we create when we crash a car.

Bending helps to control nanomaterials Posted: 22 May 2014 04:44 AM PDT A new remedy has been found to tackle the difficulty of controlling layered nanomaterials. Control can be improved by simply bending the material. Bending decreases interaction between layers, making the material merely a stack of independent atomic layers.

Liquid crystal as lubricant Posted: 22 May 2014 04:44 AM PDT Thanks to a new lubricant, small gears can run with virtually no friction. Made from liquid crystalline fluid, these lubricants drastically reduce friction and wear.

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ScienceDaily: Strange Science News

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• New 'T-ray' tech converts light to sound for weapons detection, medical imaging
• Fruit flies show mark of intelligence in thinking before they act, study suggests
• A glimpse into nature's looking glass -- to find the genetic code is reassigned: Stop codon varies widely
• Ancient DNA ends Australia's claim to kiwi origins
• First broadband wireless connection ... to the moon: Record-shattering Earth-to-Moon uplink
• Marriage of convenience with a fungus: Equal for all plants, or just some?
• More male bugs in a warmer world? Temperature influences gender of offspring in bugs
• Coffee bean roasting acoustics
• Better than polygraphs: Brain scanning for evidence
• Olive Oil Supplements May Protect against the Adverse Vascular Effects of Air Pollution

New 'T-ray' tech converts light to sound for weapons detection, medical imaging Posted: 22 May 2014 12:05 PM PDT A device that essentially listens for light waves could help open up the last frontier of the electromagnetic spectrum -- the terahertz range. So-called T-rays, which are light waves too long for human eyes to see, could help airport security guards find chemical and other weapons. They might let doctors image body tissues with less damage to healthy areas. And they could give astronomers new tools to study planets in other solar systems. Those are just a few possible applications.

Fruit flies show mark of intelligence in thinking before they act, study suggests Posted: 22 May 2014 11:14 AM PDT Fruit flies 'think' before they act, a study suggests. Neuroscientists showed that fruit flies take longer to make more difficult decisions. In experiments asking fruit flies to distinguish between ever closer concentrations of an odor, the researchers found that the flies don't act instinctively or impulsively. Instead they appear to accumulate information before committing to a choice.

A glimpse into nature's looking glass -- to find the genetic code is reassigned: Stop codon varies widely Posted: 22 May 2014 11:14 AM PDT It has long been assumed that there is only one 'canonical' genetic code, so each word means the same thing to every organism. Now, this paradigm has been challenged by the discovery of large numbers of exceptions from the canonical genetic code.

Ancient DNA ends Australia's claim to kiwi origins Posted: 22 May 2014 11:13 AM PDT Australia can no longer lay claim to the origins of the iconic New Zealand kiwi following new research showing the kiwi's closest relative is not the emu as was previously thought. Instead, the diminutive kiwi is most closely related to the extinct Madagascan elephant bird -- a 2-3 meter tall, 275 kg giant. And surprisingly, the study concluded, both of these flightless birds once flew.

First broadband wireless connection ... to the moon: Record-shattering Earth-to-Moon uplink Posted: 22 May 2014 07:49 AM PDT Scientists have prepared new details and the first comprehensive overview of the on-orbit performance of their record-shattering laser-based communication uplink between the moon and Earth, which beat the previous record transmission speed last fall by a factor of 4,800.

Marriage of convenience with a fungus: Equal for all plants, or just some? Posted: 22 May 2014 07:48 AM PDT Thanks to a fungus, the medicinal plant ribwort plantain gains a higher concentration of the defensive compound catalpol. The increase in catalpol gives the plant better protection against pests. In the study, the research team worked with arbuscular mycorrhizal fungi. These are known to colonize the roots of land plants. The plants benefit from this because the fungus provides them with nutrients and minerals. However, are the impacts of this marriage of convenience with the fungus on plant chemistry equal for all plants? That is what the researchers wanted to find out.

More male bugs in a warmer world? Temperature influences gender of offspring in bugs Posted: 22 May 2014 04:33 AM PDT Whether an insect will have a male or female offspring depends on the weather, according to a new study. As in bees, wasps, and ants, the gender determination of Trichogramma parasitoids is called "haplodiploid," that is, fertilized eggs produce female offspring, while unfertilized eggs produce male offspring. The study found that when it was hot, females deliberately produced more males than at medium temperature -- at 34°C, the number of males produced increased by 80%.

Coffee bean roasting acoustics Posted: 21 May 2014 01:29 PM PDT People around the world are drawn to coffee's powerful allure -- for its beloved smell, and taste, and for the caffeine boost it provides. As you enjoy your coffee beverage, however, odds are good you're probably not thinking about the coffee bean roasting process behind it. But for some the love of coffee runs so deep that they go so far as to roast their own coffee beans.

Better than polygraphs: Brain scanning for evidence Posted: 20 May 2014 08:57 AM PDT If conventional lie detector machines, polygraphs, have been endlessly debunked and shown not to provide admissible nor even valid evidence, then the 21st Century tool of choice for reading the minds of witnesses and putative criminals may well be the brain scanner. More specifically, the kind of functional magnetic resonance imaging (fMRI) that can seemingly probe our inner selves and reveal the flow of blood in the different regions of the brain that light up when we lie.

Olive Oil Supplements May Protect against the Adverse Vascular Effects of Air Pollution Posted: 19 May 2014 08:42 AM PDT Taking olive oil supplements may counteract some of the adverse cardiovascular effects of exposure to air pollution, according to a new study. "Our study suggests that use of olive oil supplements may protect against the adverse vascular effects of exposure to air pollution particles," said a researcher. "If these results are replicated in further studies, use of these supplements might offer a safe, low cost, and effective means of counteracting some of the health consequences of exposure to air pollution."

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ScienceDaily: Top Environment News

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• Male, female sex cell determination requires lifelong maintenance, protection
• Promising discovery in fight against antibiotic-resistant bacteria
• Biofilm defense: Mechanisms and actions of a new class of broad-spectrum antimicrobials
• Delegating dirty work is key to evolution: Working cells allow organisms to evolve
• Deep Earth recycling of the oceanic floor: New insight into the temperature of deep Earth
• Earth's lower mantle may be significantly different than previously thought
• Fruit flies show mark of intelligence in thinking before they act, study suggests
• A glimpse into nature's looking glass -- to find the genetic code is reassigned: Stop codon varies widely
• Ancient DNA ends Australia's claim to kiwi origins
• Collecting biological specimens essential to science and conservation, experts argue
• New details on microtubules and how the anti-cancer drug Taxol works
• Near-normal or below-normal 2014 Atlantic hurricane season predicted
• Near-normal or above-normal Eastern Pacific hurricane season predicted
• Near-normal or above-normal Central Pacific hurricane season predicted
• Blocking pain receptors extends lifespan, boosts metabolism in mice
• Computer models helping unravel the science of life? How cells of the fruit fly react to changes in the environment
• Safe alternatives to BPA: New technology may help identify
• Wondering about state of the environment? Just eavesdrop on bees
• HIV-positive children more likely to develop drug resistance
• Pathology of Sanfilippo A syndrome: Research provides more insight
• Fossil avatars are transforming palaeontology
• European farmers: Importance of adapting to climate change
• There is still hope for the climate: Regional cures for planetary fever
• Devastating human impact on the Amazon rainforest revealed
• Marriage of convenience with a fungus: Equal for all plants, or just some?
• Inexpensive food a key factor in rising obesity
• Could cannabis active substance curb seizures? Experts weed through evidence
• Top ten new species for 2014
• More male bugs in a warmer world? Temperature influences gender of offspring in bugs
• Dryland ecosystems emerge as driver in global carbon cycle
• Ape ancestors' teeth provide glimpse into their diets and environments: Helped apes move to Eurasia, may have led to extinction
• Evaluating 'acquired immunity' may improve estimates of infectious disease risk

Male, female sex cell determination requires lifelong maintenance, protection Posted: 22 May 2014 02:57 PM PDT The way in which the sex of an organism is determined may require lifelong maintenance, finds new research. Sex-specific transcription factors perform lifelong work to maintain sexual determination and protect against reprogramming of cells from one sex to the other. Using a mouse model, researchers found the sex of gonadal cells -- those found in the ovaries or testes -- require maintenance throughout life. This research also showed loss of a single transcription factor can result in the transformation of male cells into female cells.

Promising discovery in fight against antibiotic-resistant bacteria Posted: 22 May 2014 02:57 PM PDT A small molecule that prevents bacteria from forming into biofilms, a frequent cause of infections, has been discovered by researchers. The anti-biofilm peptide works on a range of bacteria including many that cannot be treated by antibiotics. "Currently there is a severe problem with antibiotic-resistant organisms," says the lead author of the study. "Our entire arsenal of antibiotics is gradually losing effectiveness."

Biofilm defense: Mechanisms and actions of a new class of broad-spectrum antimicrobials Posted: 22 May 2014 02:57 PM PDT Last month WHO issued a report that warned of an increase of antimicrobial-resistance and the renewed threat of bacterial infections world-wide and called for a concerted effort to develop new and better antimicrobial drugs. A new study reveals how a new type of antimicrobial substance interferes with biofilms formed by several dangerous bacteria.

Delegating dirty work is key to evolution: Working cells allow organisms to evolve Posted: 22 May 2014 11:14 AM PDT We have hundreds of types of cells in our bodies -- everything from red blood cells to hair follicles to neurons. But why can't most of them create offspring for us? New research suggests that separating germ cells -- sperm and eggs -- from somatic cells -- all other cells -- preserves the genetic building blocks while allowing organisms to flourish in a somewhat hazardous environment.

Deep Earth recycling of the oceanic floor: New insight into the temperature of deep Earth Posted: 22 May 2014 11:14 AM PDT Scientists have recreated the extreme conditions 600 to 2900 km below the Earth's surface to investigate the melting of basalt in the oceanic tectonic plates. They exposed microscopic pieces of rock to these extreme pressures and temperatures while simultaneously studying their structure. The results show basalt produced on the ocean floor has a melting temperature lower than the peridotite which forms the Earth's mantle.

Earth's lower mantle may be significantly different than previously thought Posted: 22 May 2014 11:14 AM PDT Breaking research news reveals that the composition of the Earth's lower mantle may be significantly different than previously thought. The lower mantle comprises 55 percent of the planet by volume and extends from 670 and 2900 kilometers in depth, as defined by the so-called transition zone (top) and the core-mantle boundary (below). Pressures in the lower mantle start at 237,000 times atmospheric pressure (24 gigapascals) and reach 1.3 million times atmospheric pressure (136 gigapascals) at the core-mantle boundary.

Fruit flies show mark of intelligence in thinking before they act, study suggests Posted: 22 May 2014 11:14 AM PDT Fruit flies 'think' before they act, a study suggests. Neuroscientists showed that fruit flies take longer to make more difficult decisions. In experiments asking fruit flies to distinguish between ever closer concentrations of an odor, the researchers found that the flies don't act instinctively or impulsively. Instead they appear to accumulate information before committing to a choice.

A glimpse into nature's looking glass -- to find the genetic code is reassigned: Stop codon varies widely Posted: 22 May 2014 11:14 AM PDT It has long been assumed that there is only one 'canonical' genetic code, so each word means the same thing to every organism. Now, this paradigm has been challenged by the discovery of large numbers of exceptions from the canonical genetic code.

Ancient DNA ends Australia's claim to kiwi origins Posted: 22 May 2014 11:13 AM PDT Australia can no longer lay claim to the origins of the iconic New Zealand kiwi following new research showing the kiwi's closest relative is not the emu as was previously thought. Instead, the diminutive kiwi is most closely related to the extinct Madagascan elephant bird -- a 2-3 meter tall, 275 kg giant. And surprisingly, the study concluded, both of these flightless birds once flew.

Collecting biological specimens essential to science and conservation, experts argue Posted: 22 May 2014 11:13 AM PDT Collecting plant and animal specimens is essential for scientific studies and conservation and does not, as some critics of the practice have suggested, play a significant role in species extinctions. Those are the conclusions of more than 100 biologists and biodiversity researchers.

New details on microtubules and how the anti-cancer drug Taxol works Posted: 22 May 2014 10:34 AM PDT Images of microtubule assembly and disassembly have been produced by researchers at the unprecedented resolution of 5 angstroms, providing new insight into the success of the anti-cancer drug Taxol and pointing the way to possible improvements. "This is the first experimental demonstration of the link between nucleotide state and tubulin conformation within the microtubules and, by extension, the relationship between tubulin conformation and the transition from assembled to disassembled microtubule structure," says a biophysicist on the study.

Near-normal or below-normal 2014 Atlantic hurricane season predicted Posted: 22 May 2014 10:28 AM PDT In its 2014 Atlantic hurricane season outlook issued today NOAA's Climate Prediction Center is forecasting a near-normal or below-normal season. The main driver of this year's outlook is the anticipated development of El Niño this summer. El Niño causes stronger wind shear, which reduces the number and intensity of tropical storms and hurricanes. El Niño can also strengthen the trade winds and increase the atmospheric stability across the tropical Atlantic, making it more difficult for cloud systems coming off of Africa to intensify into tropical storms.

Near-normal or above-normal Eastern Pacific hurricane season predicted Posted: 22 May 2014 10:25 AM PDT NOAA's Climate Prediction Center has announced that a near-normal or above-normal hurricane season is likely for the Eastern Pacific this year. The outlook calls for a 50 percent chance of an above-normal season, a 40 percent chance of a near-normal season, and a 10 percent chance of a below normal season.

Near-normal or above-normal Central Pacific hurricane season predicted Posted: 22 May 2014 10:21 AM PDT NOAA's Central Pacific Hurricane Center announced that climate conditions point to a near-normal or above-normal season in the Central Pacific Basin this year. For 2014, the outlook calls for a 40 percent chance of a near-normal season, a 40 percent chance of an above-normal season, and a 20 percent chance of a below-normal season.

Blocking pain receptors extends lifespan, boosts metabolism in mice Posted: 22 May 2014 09:35 AM PDT Chronic pain is known to shorten lifespan, and pain tends to increase with age. But is there a relationship between pain and longevity? Researchers have found that mice lacking the capsaicin pain receptor live around 14 percent longer than other mice, and they retain a more youthful metabolism as well. Receptor blockers could not only relieve pain, but increase lifespan, improve metabolic health and help diabetics and the obese.

Computer models helping unravel the science of life? How cells of the fruit fly react to changes in the environment Posted: 22 May 2014 09:35 AM PDT Scientists have developed a sophisticated computer modelling simulation to explore how cells of the fruit fly react to changes in the environment. The model shows how cells of the fruit fly communicate with each other during its development.

Safe alternatives to BPA: New technology may help identify Posted: 22 May 2014 09:34 AM PDT Numerous studies have linked exposure to bisphenol A (BPA) in plastic, receipt paper, toys, and other products with various health problems from poor growth to cancer, and the FDA has been supporting efforts to find and use alternatives. But are these alternatives safer? Researchers have developed new tests that can classify such compounds' activity with great detail and speed. The advance could offer a fast and cost-effective way to identify safe replacements for BPA.

Wondering about state of the environment? Just eavesdrop on bees Posted: 22 May 2014 09:34 AM PDT Want a simple way to monitor wide swaths of the landscape without breaking a sweat? Listen in on the 'conversations' honeybees have with each other, researchers suggest. The scientists' analyses of honeybee waggle dances suggest that costly measures to set aside agricultural lands and let the wildflowers grow can be very beneficial to bees.

HIV-positive children more likely to develop drug resistance Posted: 22 May 2014 09:33 AM PDT 74 percent of HIV-positive children in a study developed resistance to at least one form of drug treatment. The researchers followed almost 450 children enrolled in the Pediatric HIV/AIDS Cohort Study, one of the largest studies of HIV-positive children in the United States. "The problem with drug resistance is that once you develop it, it never goes away," said the principal investigator. "Some patients with very resistant virus have no effective treatment options. Resistant virus is the major reason for death among youth with perinatal HIV."

Pathology of Sanfilippo A syndrome: Research provides more insight Posted: 22 May 2014 07:51 AM PDT Sanfilippo A syndrome is a rare genetic lysosomal storage disease inherited from the parents of the patient. Lysosomes are the body's vehicle for breaking down many of its by-products such as proteins, nucleic acids, carbohydrates, lipids and cellular debris. New research advances the knowledge of the structural features of sulfamidase in the context of this illness, and will greatly facilitate the discovery of suitable compounds and drugs to assist in managing the disease and its debilitating effects.

Fossil avatars are transforming palaeontology Posted: 22 May 2014 07:51 AM PDT New techniques for visualizing fossils are transforming our understanding of evolutionary history. Palaeontology has traditionally proceeded slowly, with individual scientists labouring for years or even decades over the interpretation of single fossils. The introduction of X-ray tomography has revolutionized the way that fossils are studied, allowing them to be virtually extracted from the rock in a fraction of the time necessary to prepare specimens by hand and without the risk of damaging the fossil.

European farmers: Importance of adapting to climate change Posted: 22 May 2014 07:49 AM PDT Farmers in Europe will see crop yields affected as global temperatures rise, but that adaptation can help slow the decline for some crops. Research reveals that farmers in Europe will see crop yields affected as global temperatures rise, but that adaptation can help slow the decline for some crops. For corn, the anticipated loss is roughly 10 percent, the research shows. Farmers of these crops have already seen yield growth slow down since 1980 as temperatures have risen, though other policy and economic factors have also played a role.

There is still hope for the climate: Regional cures for planetary fever Posted: 22 May 2014 07:48 AM PDT There is still hope for the climate, even if a world-wide climate accord proves to be unattainable. A new report shows that regional measures can hold the global rise in temperature within the two-degree limit.

Devastating human impact on the Amazon rainforest revealed Posted: 22 May 2014 07:48 AM PDT The human impact on the Amazon rainforest has been grossly underestimated according to an international team of researchers. They found that selective logging and surface wildfires can result in an annual loss of 54 billion tons of carbon from the Brazilian Amazon, increasing greenhouse gas emissions. This is equivalent to 40% of the yearly carbon loss from deforestation -- when entire forests are chopped down.

Marriage of convenience with a fungus: Equal for all plants, or just some? Posted: 22 May 2014 07:48 AM PDT Thanks to a fungus, the medicinal plant ribwort plantain gains a higher concentration of the defensive compound catalpol. The increase in catalpol gives the plant better protection against pests. In the study, the research team worked with arbuscular mycorrhizal fungi. These are known to colonize the roots of land plants. The plants benefit from this because the fungus provides them with nutrients and minerals. However, are the impacts of this marriage of convenience with the fungus on plant chemistry equal for all plants? That is what the researchers wanted to find out.

Inexpensive food a key factor in rising obesity Posted: 22 May 2014 04:47 AM PDT An important factor fueling the obesity epidemic has been identified by a new review: Americans now have the cheapest food available in history. Today, two in three Americans are overweight or obese, with rates climbing steadily over the past several decades. Many factors have been suggested as causes: snack food, automobiles, television, fast food, computer use, vending machines, suburban housing developments, and portion size. But after examining available evidence, the authors say widespread availability of inexpensive food appears to have the strongest link to obesity.

Could cannabis active substance curb seizures? Experts weed through evidence Posted: 22 May 2014 04:47 AM PDT The therapeutic potential of medical marijuana and pure cannabidiol (CBD), an active substance in the cannabis plant, for neurologic conditions is highly debated. A series of articles examine the potential use of medical marijuana and CBD in treating severe forms of epilepsy such as Dravet syndrome.

Top ten new species for 2014 Posted: 22 May 2014 04:33 AM PDT An international committee selected the top 10 from among the approximately 18,000 new species named during the previous year. The list includes a quartet of tiny newcomers to science: a miniscule skeleton shrimp from Santa Catalina Island in California, a single-celled protist that does a credible imitation of a sponge, a clean room microbe that could be a hazard during space travel and a teensy fringed fairyfly named Tinkerbell.

More male bugs in a warmer world? Temperature influences gender of offspring in bugs Posted: 22 May 2014 04:33 AM PDT Whether an insect will have a male or female offspring depends on the weather, according to a new study. As in bees, wasps, and ants, the gender determination of Trichogramma parasitoids is called "haplodiploid," that is, fertilized eggs produce female offspring, while unfertilized eggs produce male offspring. The study found that when it was hot, females deliberately produced more males than at medium temperature -- at 34°C, the number of males produced increased by 80%.

Dryland ecosystems emerge as driver in global carbon cycle Posted: 21 May 2014 03:00 PM PDT Dryland ecosystems, which include deserts to dry-shrublands, play a more important role in the global carbon cycle than previously thought. In fact, they have emerged as one of its drivers. Surprised by the discovery, researchers urged global ecologists to include the emerging role of dryland ecosystems in their research.

Ape ancestors' teeth provide glimpse into their diets and environments: Helped apes move to Eurasia, may have led to extinction Posted: 21 May 2014 03:00 PM PDT Newly analyzed tooth samples from the great apes of the Miocene indicate that the same dietary specialization that allowed the apes to move from Africa to Eurasia may have led to their extinction. Apes expanded into Eurasia from Africa during the Miocene (14 to 7 million years ago) and evolved to survive in new habitat. Their diet closely relates to the environment in which they live and each type of diet wears the teeth differently.

Evaluating 'acquired immunity' may improve estimates of infectious disease risk Posted: 21 May 2014 10:31 AM PDT A new health study that accounts for "acquired immunity" when evaluating the risk of microbial illness from food or environmental exposures suggests that some current approaches may significantly overestimate their role in causing such illnesses. Immune status is a major factor in susceptibility to foodborne and environmental infectious diseases. By considering both the impact of acquired immunity to a pathogen and the amount of a pathogen to which people are exposed, researchers have developed a novel approach for more accurately assessing the potential health risks of infectious diseases.

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