Transferable Aspherical Atom Model (TAAM) instead of Independent Atom Model (IAM) applied through DiSCaMB software library in the structure refinement against X-ray diffraction data largely improves the X—H bond lengths and make them comparable to the averaged neutron bond lengths.

Recently, researchers from Boston University and the Smithsonian Tropical Research Institute in Panama have been taking a closer look at the vibrations that red-eyed treefrog embryos use as cues to trigger early hatching. They discovered that treefrog embryos can evaluate different features of vibrations.

The post Researchers discover treefrog embryos can evaluate different features of vibrations appeared first on Smithsonian Insider.

Two very different models explain the possible origin of Type Ia supernovae, and different studies support each model. New evidence shows that both models are correct - some of these supernovae are created one way and some the other.

The post One supernova type, two different sources appeared first on Smithsonian Insider.

The world’s coasts are home to more than 70 percent of the human population and experience intense development as a result. The rate of environmental […]

The post Smithsonian Environmental Research Center Marks 50 Years of Making a Difference appeared first on Smithsonian Insider.

The main mass of a rare meteorite that exploded over California’s Sierra foothills in April 2012 will be preserved for current and future scientific discoveries, […]

The post Pieces of rare meteorite land at five different academic institutions appeared first on Smithsonian Insider.

Seven corrections are made and several supplementary equations are added to the article by Yoshimura [Acta Cryst. (2015), A71, 368–381].

Single-wavelength X-ray anomalous diffraction (SAD) is a frequently employed technique to solve the phase problem in X-ray crystallography. The precision and accuracy of recovered anomalous differences are crucial for determining the correct phases. Continuous rotation (CR) and inverse-beam geometry (IBG) anomalous data collection methods have been performed on tetragonal lysozyme and monoclinic survivin crystals and analysis carried out of how correlated the pairs of Friedel's reflections are after scaling. A multivariate Bayesian model for estimating anomalous differences was tested, which takes into account the correlation between pairs of intensity observations and incorporates the a priori knowledge about the positivity of intensity. The CR and IBG data collection methods resulted in positive correlation between I(+) and I(−) observations, indicating that the anomalous difference dominates between these observations, rather than different levels of radiation damage. An alternative pairing method based on near simultaneously observed Bijvoet's pairs displayed lower correlation and it was unsuccessful for recovering useful anomalous differences when using the multivariate Bayesian model. In contrast, multivariate Bayesian treatment of Friedel's pairs improved the initial phasing of the two tested crystal systems and the two data collection methods.

Relativistic electron diffraction depends on linear and quadratic terms in the electric potential, the latter being neglected in the frequently used relativistically corrected Schrödinger equation. The quadratic electric potential term modifies atomic scattering amplitudes in particular for large-angle scattering and backscattering. The respective correction increases with increasing scattering angle, increasing atomic number and increasing kinetic energy. Conventional tabulations for electron scattering and its large-angle extrapolations can be amended in closed form by a universal correction based on the screened Coulomb potential squared.

The use of strongly bent crystals in spectrometers for pulses of a hard X-ray free-electron laser is explored theoretically. Diffraction is calculated in both dynamical and kinematical theories. It is shown that diffraction can be treated kinematically when the bending radius is small compared with the critical radius given by the ratio of the Bragg-case extinction length for the actual reflection to the Darwin width of this reflection. As a result, the spectral resolution is limited by the crystal thickness, rather than the extinction length, and can become better than the resolution of a planar dynamically diffracting crystal. As an example, it is demonstrated that spectra of the 12 keV pulses can be resolved in the 440 reflection from a 20 µm-thick diamond crystal bent to a radius of 10 cm.

A crystallographic indexing algorithm, pinkIndexer, is presented for the analysis of snapshot diffraction patterns. It can be used in a variety of contexts including measurements made with a monochromatic radiation source, a polychromatic source or with radiation of very short wavelength. As such, the algorithm is particularly suited to automated data processing for two emerging measurement techniques for macromolecular structure determination: serial pink-beam X-ray crystallography and serial electron crystallography, which until now lacked reliable programs for analyzing many individual diffraction patterns from crystals of uncorrelated orientation. The algorithm requires approximate knowledge of the unit-cell parameters of the crystal, but not the wavelengths associated with each Bragg spot. The use of pinkIndexer is demonstrated by obtaining 1005 lattices from a published pink-beam serial crystallography data set that had previously yielded 140 indexed lattices. Additionally, in tests on experimental serial crystallography diffraction data recorded with quasi-monochromatic X-rays and with electrons the algorithm indexed more patterns than other programs tested.

Crystal structure identification of thin organic films entails a number of technical and methodological challenges. In particular, if molecular crystals are epitaxially grown on single-crystalline substrates a complex scenario of multiple preferred orientations of the adsorbate, several symmetry-related in-plane alignments and the occurrence of unknown polymorphs is frequently observed. In theory, the parameters of the reduced unit cell and its orientation can simply be obtained from the matrix of three linearly independent reciprocal-space vectors. However, if the sample exhibits unit cells in various orientations and/or with different lattice parameters, it is necessary to assign all experimentally obtained reflections to their associated individual origin. In the present work, an effective algorithm is described to accomplish this task in order to determine the unit-cell parameters of complex systems comprising different orientations and polymorphs. This method is applied to a polycrystalline thin film of the conjugated organic material 6,13-pentacene­quinone (PQ) epitaxially grown on an Ag(111) surface. All reciprocal vectors can be allocated to unit cells of the same lattice constants but grown in various orientations [sixfold rotational symmetry for the contact planes (102) and (102)]. The as-determined unit cell is identical to that reported in a previous study determined for a fibre-textured PQ film. Preliminary results further indicate that the algorithm is especially effective in analysing epitaxially grown crystallites not only for various orientations, but also if different polymorphs are present in the film.

Recent developments of two-color operation modes at X-ray free-electron laser facilities provide new research opportunities, such as X-ray pump/X-ray probe experiments and multiple-wavelength anomalous dispersion phasing methods. However, most existing indexing methods were developed for indexing diffraction data from monochromatic X-ray beams. Here, a new algorithm is presented for indexing two-color diffraction data, as an extension of the sparse-pattern indexing algorithm SPIND, which has been demonstrated to be capable of indexing diffraction patterns with as few as five peaks. The principle and implementation of the two-color indexing method, SPIND-TC, are reported in this paper. The algorithm was tested on both simulated and experimental data of protein crystals. The results show that the diffraction data can be accurately indexed in both cases. Source codes are publicly available at https://github.com/lixx11/SPIND-TC.

National Zoo Veterinarian Katharine Hope treats about 2,000 animals from 400 different species. She and her colleagues care for a variety of animals, from small baby flamingos to adult Asian elephants, so there's no such thing as an average day.

The post National Zoo veterinarian Katharine Hope is in charge of the health of 2,000 animals from 400 different species. appeared first on Smithsonian Insider.

The methods for X-ray crystal orientation are rapidly evolving towards versatility, fewer goniometry measurements, automation, high accuracy and precision. One method that attracts a lot of attention is energy-dispersive X-ray diffraction (EDXRD) which is based on detecting reflections from crystallographic planes in a crystal at fixed angles of a parallel polychromatic X-ray incident beam. In theory, an EDXRD peak can move in a diffraction pattern as a function of a crystallographic plane d-spacing and its orientation relative to a fixed direction in space can change also. This is equivalent to the possibility of measuring the orientation of single crystals. The article provides a modeling for the EDXRD method whose main feature is the nonmoving crystal in the sense of traditional goniometry where the angle measurements of diffracting planes are a must. The article defines the equation of orientation for the method and shows the derivation in great detail. It is shown that the exact solutions of the equations can be obtained using the generalized reduced gradient method, a mathematical subroutine that is implemented in Excel software. The significance and scientific impact of the work are discussed along with the validated tested results.

To date X-ray protein crystallography is the most successful technique available for the determination of high-resolution 3D structures of biological molecules and their complexes. In X-ray protein crystallography the structure of a protein is refined against the set of observed Bragg reflections from a protein crystal. The resolution of the refined protein structure is limited by the highest angle at which Bragg reflections can be observed. In addition, the Bragg reflections alone are typically insufficient (by a factor of two) to determine the structure ab initio, and so prior information is required. Crystals formed from an imperfect packing of the protein molecules may also exhibit continuous diffraction between and beyond these Bragg reflections. When this is due to random displacements of the molecules from each crystal lattice site, the continuous diffraction provides the necessary information to determine the protein structure without prior knowledge, to a resolution that is not limited by the angular extent of the observed Bragg reflections but instead by that of the diffraction as a whole. This article presents an iterative projection algorithm that simultaneously uses the continuous diffraction as well as the Bragg reflections for the determination of protein structures. The viability of this method is demonstrated on simulated crystal diffraction.

Diffuse scattering is a rich source of information about disorder in crystalline materials, which can be modelled using atomistic techniques such as Monte Carlo and molecular dynamics simulations. Modern X-ray and neutron scattering instruments can rapidly measure large volumes of diffuse-scattering data. Unfortunately, current algorithms for atomistic diffuse-scattering calculations are too slow to model large data sets completely, because the fast Fourier transform (FFT) algorithm has long been considered unsuitable for such calculations [Butler & Welberry (1992). J. Appl. Cryst. 25, 391–399]. Here, a new approach is presented for ultrafast calculation of atomistic diffuse-scattering patterns. It is shown that the FFT can actually be used to perform such calculations rapidly, and that a fast method based on sampling theory can be used to reduce high-frequency noise in the calculations. These algorithms are benchmarked using realistic examples of compositional, magnetic and displacive disorder. They accelerate the calculations by a factor of at least 102, making refinement of atomistic models to large diffuse-scattering volumes practical.

Features of azimuthal plots for RHEED and its new counterpart, RHEPD, are discussed. The plots, for both electrons and positrons, are determined using dynamical diffraction theory.

A method is described for indexing grazing-incidence X-ray diffraction data of epitaxially grown thin films comprising various crystal orientations and/or polymorphs by measuring reciprocal-lattice vectors.

The analytical solution of the problem of X-ray spherical-wave Laue diffraction in a single crystal with a linear change of thickness on the exit surface is derived. General equations are applied to a specific case of plane-wave Laue diffraction in a thick crystal under the conditions of the Borrmann effect.

The search for life elsewhere in the solar system and beyond should include efforts to detect what scientists sometimes refer to as weird life -- that is, life with an alternative biochemistry to that of life on Earth -- says a new report from the National Research Council.

Urban flooding is a complex and distinct kind of flooding, compounded by land use and high population density, and it requires a different approach to assess and manage, says Framing the Challenge of Urban Flooding in the United States, a new report from the National Academies of Sciences, Engineering, and Medicine.

US President Barack Obama and Republican Presidential nominee Mitt Romney debate on October 16, 2012 at Hofstra University in Hempstead, New York. Undecided voters asked questions during a town hall format.; Credit: STAN HONDA/AFP/Getty Images

There continue to be questions about how moderators approach Presidential debates and about whether the extra time President Obama has received in the first two debates indicates moderator bias in his favor. 

I had chalked up the concerns to Republican hyper-partisanship, such as we saw with many Democrats criticizing Jim Lehrer for his moderating — as though Obama would’ve won the first debate if only Lehrer had asserted himself more.   However, even CNN has been doing significant follow-up on its own Candy Crowley’s performance in debate number two. 

Maybe it’s not just hardcore GOP loyalists who are questioning Crowley’s decision-making on when to cut in and when to allow the candidates to take more time. I thought she did pretty well, but there are plenty of critics.

As someone who has moderated hundreds of debates, I thought I’d share my thoughts on what we’ve seen so far in this election. Though I’ve never moderated a Presidential debate, with its incredible level of attention, concern about rules, and demands by campaigns, there are certain fundamentals regardless of the office or issue at stake.

Time Doesn't Matter...Too Much
First, as strange as this may sound, the time taken by each candidate has little to do with who has an advantage.   Yes, it’s always possible for a candidate to use another minute to fire off the defining line of the night. However, the well-practiced zingers or essential policy explainers are not left to the end of a candidate’s statement, as the clock is running out. 

I’m sure Mitt Romney wasn’t thinking after the last debate, “If only I would’ve had that extra 90-seconds, and Obama hadn’t gotten 90 more than he deserved.”  Both men front-loaded their major talking points and were going to get them in. Neither man could legitimately say he didn’t have a chance to make his strongest points. At some point, a time advantage could make a difference in who wins or loses, but an extra 90-seconds in a debate longer than 90-minutes isn’t going to do it.

Serving The Audience
As a moderator, you also have to think about what best serves your audience. I never guarantee candidates equal time, as it’s my job to serve the listeners, not their campaigns. I strive to get close to equal time, but can’t make any guarantee. Some speakers get to the point succinctly and have their points well put together. Others are messier in their arguments and eat up time just building up any head of steam. 

If the moderator holds to a strict time limit, you run the risk of frustrating listeners by cutting off the rambler just as the candidate is getting to the point. There are methods a moderator can use to help guide the speaker toward being more succinct, but there’s no guarantee the person will be able to comply.

Isn’t this inherently unfair to the succinct speaker? No. The purpose of the debate is to allow the ideas to compete.  It’s not a boxing match that’s about landing punches in a given time. The succinct debater has a big advantage, regardless of how much time the candidate has. That’s why Mitt Romney’s victory in the first debate was so lopsided — he won on the conciseness and clarity of his answers, coupled with Obama’s inability to get to his central points.  Obviously, there are those who thought Obama’s arguments were still more compelling than Romney’s, and that Romney lacked essential details.  However, for most viewers of the first debate, it was stylistically no contest.

Equal Time Is Not A Guarantee
When candidates are allowed to talk to each other directly, it’s very difficult to assure equal time. Even CNN’s clock that registers elapsed time for each candidate is subject to squishiness. Unless a debate is extremely formal, with carefully controlled time limits and a ban on candidates following-up with each other, you’re only going to have an approximation of time balance. I thought Crowley did pretty well to land the second debate with the balance she did. I’m not sure I could get it that close for a debate of that length. She had the added challenge of trying to determine when to cut in on President Obama’s lengthier answers. Also, Romney’s speaking rhythm allows more space for interruption. It’s tougher to break in on Obama.

Moderating Is A Balancing Act
Moderators are always trying to balance a need to move on to the next topic with allowing a candidate to answer an opponent’s charge. Sometimes, you open that door for a candidate, only to regret it later when the politician starts into a monologue, instead of confining the response to the previous challenge. Sometimes moderators, having gotten burned, will become less tolerant of such expansive rebuttals, as the debate goes on. Moderators are always juggling competing goals, and it’s a difficult job (at least for me).

Unfortunately, there are those who think debate moderators attempt to influence the outcome of the debate and the performances of the candidates. Maybe I’m naïve, but I can’t imagine any journalist who’s worked hard enough to get to the position of Presidential debate moderator subordinating his or her career in an effort to getting someone elected. Mainstream political journalism is like national sports reporting. You really don’t care who wins the Super Bowl, you want great story lines to explore with your audience. Yes, sports reporters have affinities for the hometown teams of their youth, but that can’t compete with the professional goal of covering great stories. 

Yes, most journalists in mainstream media probably have a stronger cultural and political affinity for Obama, as he’s more like them. However, it doesn’t mean a journalist is going to sacrifice the better story to intentionally provide a benefit to the President.

This content is from Southern California Public Radio. View the original story at SCPR.org.

; Credit: /Hanna Barczyk for NPR

What will happen on college campuses in the fall? It's a big question for families, students and the schools themselves.

A lot of what happens depends on factors outside the control of individual schools: Will there be more testing? Contact tracing? Enough physical space for distancing? Will the coronavirus have a second wave? Will any given state allow campuses to reopen?

For all of these questions, it's really too early to know the answers. But one thing is clear: Life, and learning for the nation's 20 million students in higher education, will be different.

"I don't think there's any scenario under which it's business as usual on American college campuses in the fall," says Nicholas Christakis, a sociologist and physician at Yale University.

So why are so many colleges announcing they will be back on campus in the fall?

In many cases, it's because they're still trying to woo students. A survey of college presidents found their most pressing concern right now is summer and fall enrollment. Even elite schools, typically more stable when it comes to enrollment, have reportedly been tapping their waitlists.

In the midst of all this uncertainty, it's worth looking at some of the ideas out there. With the help of Joshua Kim and Edward J. Maloney, professors and authors of the book Learning Innovation and the Future of Higher Education, here are some potential scenarios for reopening colleges and universities:

All virtual

Perhaps the most obvious option for the fall is to continue doing what they've been doing this spring. Colleges have signaled that they're planning for this option — even if it's a last resort. California State University, Fullerton, was one of the first to announce publicly it was planning for a fall semester online.

"Obviously we want to resume in-person teaching as soon as possible, but we also need to make sure that we're safe," says Ellen Treanor, who helps lead strategic communication at the school. Treanor says it made a lot of sense to assume the school would start online. "What would be the easier way to transition? It would be easier to transition beginning virtually and then transitioning in person," she said. "The faculty [needs] to be prepared."

With virtual classes, students can remain at home, although some colleges are exploring bringing them back to campus, where they could use the school's Wi-Fi to take online classes.

Delayed start

A delay in the semester would allow a school to wait it out until it was safer to reopen. One option is to push back a month or two, starting in October or November. Another idea is to push a normal start to January. In that case, the spring semester would become the fall semester, and potentially students could stay on campus through next summer to make up the spring semester. Boston University floated a version of this January start date when it announced a number of plans it was exploring.

One downside to a late start is what students will do in the meantime, especially those who don't have financial stability and rely on campus or the university to be a safe and stable home.

Some online, some face-to-face

This would be a hybrid model, with a combination of virtual and in-person classes. It may be a good choice for campuses that don't have enough classrooms to allow adjusting face-to-face teaching to the requirements of social distancing.

"You might have some of the larger classes being taught online simply because it's harder to imagine a 150- or 350-person classroom," says Maloney, who leads the Center for New Designs in Learning and Scholarship at Georgetown University. "So you might see that class split up into multiple sections." For large, entry-level classes, colleges may have a lecture component online and then meet in smaller groups in person.

"The hybrid model doesn't have to just be about modality," Maloney says. "It can be, but it could also be about fundamentally rethinking what the core structure has been for those large classes."

Of course, shifting larger classes online may not be enough, by itself, to alleviate the health concerns of having students on campus. Early research from Cornell University found that eliminating such classes didn't lessen student interactions with each other.

Shortened blocks

In block scheduling, students take just one course at a time for a shorter duration, typically three or four weeks. Colorado College, a liberal arts school south of Denver, has been using this model for 50 years. The college adopted this style of classes because "it allows [students] to take a deep dive and really focus in unique ways on the single subject," says Alan Townsend, the provost there. In a typical year, the school offers eight blocks.

In addition to its intensity, block scheduling is attractive right now because it allows flexibility. Colleges that use it have the opportunity to change the way classes look every three weeks — since there are multiple start and stop points. (With a semester, you have only a single start and then, often 16 weeks later, an end.)

"It's easier for us to now think creatively for next year," Townsend says. "Different students can make different choices. That's really hard to do with a semester-based system, but the blocks allow us to do that a little bit more flexibly."

The school is also entertaining the idea of sending faculty abroad to teach a block for international students who might not be able to enter the U.S, or adding summer blocks to give students even more opportunities to take classes.

Only some on campus

Some colleges have suggested bringing only freshmen back to campus and having upperclassmen either delay their start, or be online and remote.

The idea centers on research that shows just how important a student's first year of college is as a predictor of graduation. Adapting to campus can be a challenge, so this would allow first-year students to get comfortable and have extra support on campus.

Since upperclassmen are already familiar with how campus and classes work, the theory goes, they can more easily adapt to an online environment. Other versions of this approach would have students who have housing needs come back to campus first, and then, over time, phase in other groups of students.

All these options seek to keep the population density of the campus lower while still maintaining some face-to-face interactions.

On campus, with some changes

Social distancing, improved testing and contact tracing could help colleges reopen their campuses.

"Every school is trying to figure out a way to have students come back and do whatever we can while also protecting public health," says Learning Innovation co-author Joshua Kim, director of online programs and strategy at Dartmouth College.

"At the same time, we know that, however that works, things will be different. It's probably unlikely that we'll be able to cram students together in large, packed lecture halls or put doubles and triples in residence halls or have big events."

To follow social distancing, professors are measuring their classrooms, calculating how many students could fit in the space if they were 6 feet apart. Deans are planning out how students could enter and exit the classrooms safely.

But it's not just the classrooms that pose a challenge. For residential colleges, it's the dorms.

"Whether or not students are actually learning in the classroom, it's incredibly important for them to have an on-campus experience," Maloney says. So schools are thinking about how they can spread their students out, putting them in places where they normally wouldn't go.

Some ideas include housing students in offices that aren't being used, local hotel rooms or off-campus housing. Institutions are also reimagining campus events, like freshman orientation, since it's unlikely hundreds of students will be in a packed auditorium.

"Rethinking how we do everything we do at a university is part of the process," Maloney says.

This content is from Southern California Public Radio. View the original story at SCPR.org.

Effective flood-risk management requires accurate risk-analysis models. Conventional analysis approaches, however, are based on the evaluation of spatially homogenous scenarios, which do not account for variation in flooding across a river reach/ region. Since flood events are often spatially heterogeneous (i.e. unevenly distributed), this paves the way for error. Now, scientists have developed a novel framework for risk analysis that accounts for their heterogeneity, and successfully demonstrated the accuracy of the approach by applying it in a proof-of-concept exercise in Vorarlberg, Austria. By facilitating improved prediction and quantification of flood events, this model is likely to inform future flood-risk management and related decision-making.

Little difference was found between organically grown tomatoes and tomatoes grown conventionally in greenhouses over a three year period, in terms of taste and nutritional value, according to a recent study in the Netherlands. Taste and nutrition were more dependent on the breed of tomato.

The actual carbon footprint of products and services can differ considerably according to how energy used to manufacture the product was generated – for example, whether it was generated by fossil fuel or renewable sources. A recent US study has therefore recommended that differences in regional power supply should be acknowledged by life cycle assessments of products and services.

A recent study has assessed the sustainability of different nuclear cycle scenarios in Europe, and suggests trade-offs are required between reducing the amount of uranium fuel needed, costs and proliferation risks.

Agricultural intensification can significantly affect soil ecosystems and the services they provide, new research suggests. Examining soils across Europe, the study demonstrates that high intensity arable land uses have lower diversity and biomass of soil organisms than lower intensity arable or permanent grassland, affecting the carbon and nitrogen cycles in the environment.

Researchers have modelled the exposure to multiple hazards across different regions of Europe in relation to heat, cold, drought, wildfire, flooding and wind. The study indicated that, over the next century, environmental hazards are likely to increase, particularly along coastlines and on floodplains, and that south-western Europe is likely to be the worst-hit region.

Sustainable management of phosphorus requires better information on how it flows through the environment via consumption and waste. New research from Sweden has found that 40% of phosphorus released by Gothenburg to the environment is in sewage sludge and a further 40% is in incineration ash. This suggests that phosphorus could be recycled from solid waste as well as from wastewater.

Injecting light-reflecting particles into the atmosphere to counteract rising levels of greenhouse gas emissions cannot stabilise both temperatures and rainfall in all regions of the world at the same time, according to recent research. This raises serious questions about how such a process could be managed.

A new study has found evidence for lung toxicity of different forms of ‘cellulose nanocrystals’ (CNCs) in mice. The study suggests that physical characteristics, such as length, of the CNC relates to the type of effect it has on the lung. These nanosized crystals, made from plant-derived materials, are increasingly being used in novel applications, such as cleaning up oil spills in water and flexible electronic displays, and consumer products, which raises concerns about their potential health impacts.

Progress towards achieving a sustainable urban environment may be measured by sustainability indicators (SIs), which can be chosen to represent values that are important to local communities. A recent study has assessed a set of SIs developed by both sustainability experts and local citizens and suggests that local communities can attach different values to SIs to reflect local values and understandings of sustainability.

When broken down, ships can release hazardous substances into the environment. This study investigated the environmental impact of shipbreaking in one of Europe’s few ship recycling yards, based in Portugal. The results reveal large differences between assessment methods and show that environmental impact depends on composition rather than size or class.

Carbon footprints are an established means of communicating one aspect of a product's environmental impact. New research suggests additional 'nitrogen footprints' for food products could give consumers a more informed choice and help reduce eutrophication in water. However, it warns that there are environmental trade-offs for some food groups, for example, oil products have a small nitrogen footprint, but a fairly large carbon footprint.

Sustainable management of phosphorus requires better information on how it flows through the environment via consumption and waste. New research from Sweden has found that 40% of phosphorus released by Gothenburg to the environment is in sewage sludge and a further 40% is in incineration ash. This suggests that phosphorus could be recycled from solid waste as well as from wastewater.

One-fifth of the world's mammals, birds, amphibians, reptiles and fish are threatened with extinction, according to a recent report. The study notes that there have been many conservation success stories, but far greater long-term resources are needed to improve the outlook for the world's threatened vertebrate species.

Conservation policy needs to take account of diverse cultural views about the value of different species, according to the results of a new study. Widely differing views of the relative importance of marine species ??? from algae to mammals ??? emerged when the researchers surveyed people across Europe.

The Natura 2000 network is the backbone of nature conservation in the EU, and agri-environment schemes (AES) are an important tool to protect biodiversity on European farmland. A recent study, which investigated the effectiveness of AES in relation to grassland birds in Poland, found that AES were not associated with species richness of target species, and proposed a number of reasons for this. The researchers recommend that AES management regimes should be diversified and customised to provide optimal habitat for a wider range of bird species.

The world's first full-scale artificial wetland designed to treat both sewage effluent and mine wastewater has been found to continuously remove high levels of pollutants, a recent study concludes. Treating both types of wastewater at the same time proved to be highly beneficial because they contain pollutants which are more easily removed when mixed together.

Richard Johnson believes that it is a tall order for any top-flight club, not just Watford, to hand homegrown players from the academy a chance to play in the Premier League due to what is at stake in financial and sporting terms.

...

As world leaders fly into Rio de Janeiro for Rio+20, thousands of people from indigenous tribes, environmental groups, unions and religious organizations gather

If you want to get the most nutrients out of your veggies, don't worry about gaining polyphenols or losing nutrients. Just eat them.

From boosting metabolism to post-workout hydration, does coconut water live up to its claims? And what about coconut milk?

Real maple syrup is worth the extra expense, but why choose maple syrup over other natural sweeteners like honey or sugar? Here's why and what to look for.

It's colder up here and the harvest is earlier, but that's not the only reason Canadian Thanksgiving is different than American Thanksgiving.

From nearsightedness to bone mass, a trip to the International Space System has a notable effect on astronauts' bodies.

These individuals and organizations support a variety of green causes with generously large donations.

A regular marathon will sound like an easy warm-up compared to these crazy yet compelling endurance races.