Exquisitely preserved in fossil sediments dating from the Middle Jurassic, the insect, newly named Juracimbrophlebia ginkgofolia, was discovered in 165 million-year-old deposits, as was the ginko-like tree, Yimaia capituliformis, the mimicked plant.

The post Insect mimic of ginko-like leaf discovered 165 million years after its extinction appeared first on Smithsonian Insider.

South American rainforests thrived during three extreme global warming events in the past, say paleontologists at the Smithsonian Tropical Research Institute in a new report […]

The post Smithsonian scientists discover that rainforests take the heat appeared first on Smithsonian Insider.

A joint research initiative carried out by scientists from the Smithsonian Institution, Saint Louis University and the Universidad de Los Andes in Venezuela, has resulted in […]

The post New daisy species discovered in Venezuela appeared first on Smithsonian Insider.

The hard rocklike material on which the living algae Clathromorphum compactum sits are layers of calcified crusts the algae deposit year after year. These “red […]

The post New climate ‘archive’ discovered in sub-Arctic appeared first on Smithsonian Insider.

For centuries untold numbers of this tiny arachnid (cousin to spiders and ticks) have ended up in teapots, invisibly steeping alongside the leaves of the tea plant on which it lives.

The post Primitive, bizarre, beautiful: New mite species reveal a lost world awaiting discovery appeared first on Smithsonian Insider.

Invertebrate Zoology Scientists studying pollinators of the yellow poppy (Meconopsis integrifolia) in the highlands of southern China have discovered a striking new species of flower fly […]

The post New species of poppy pollinating fly discovered in China appeared first on Smithsonian Insider.

A global analysis raises the minimum estimated number of tropical tree species to at least 40,000–53,000 worldwide in a paper appearing in Proceedings of the […]

The post Analysis: Many tropical tree species have yet to be discovered appeared first on Smithsonian Insider.

Residents of the southeastern United States might occasionally come across an oddity along a barbed-wire fence: a series of insects, mice or even small birds […]

The post Tiny, fierce and disappearing: breeding program aims to help the loggerhead shrike appeared first on Smithsonian Insider.

Although useful to Tarzan, vines endanger tropical forests’ capacity to store carbon. In a major experimental study in Panama, Smithsonian researchers showed that woody vines, […]

The post Climbing plants disturb carbon storage in tropical forests appeared first on Smithsonian Insider.

Rattlesnake, zebra and peacock plants have a new wild relative, discovered by Rodolfo Flores, Panamanian botanist and intern at the Smithsonian Tropical Research Institute (STRI). […]

The post Smithsonian Botanist Discovers New Ground-Flowering Plant in Panama appeared first on Smithsonian Insider.

New results from a long-term Smithsonian study are providing strong evidence of the dramatic impact high numbers of white-tailed deer (Odocoileus virginianus) are having upon […]

The post Deer Discovery: Invasive Plants Get Boost from too Many Deer appeared first on Smithsonian Insider.

Unless you’ve been living under a rock for the last few years, you’ve doubtless caught at least a passing reference to the plight of the […]

The post Discovery: Rising CO2 depletes pollen’s nutritional potency, bees suffer appeared first on Smithsonian Insider.

Strategically placed honeybee hives can deter African elephants from raiding crops, but the hives must be actively managed by beekeepers to work, according to a […]

The post Study: Managed beehives can discourage crop-raiding elephants appeared first on Smithsonian Insider.

Smithsonian scientists have discovered two new gecko species—the Lenya banded bent-toed gecko (Cyrtodactylus lenya) and Tenasserim Mountain bent-toed gecko (C. payarhtanesnsis)—in the little-studied lowland forests […]

The post Smithsonian Scientists Discover Two New Gecko Species in Vanishing Myanmar Rainforest appeared first on Smithsonian Insider.

It is shown how to reconstruct the stacking sequence from the pairwise correlation functions between layers in close-packed structures. First, of theoretical interest, the analytical formulation and solution of the problem are presented when the exact pairwise correlation counts are known. In the second part, the practical problem is approached. A simulated annealing procedure is developed to solve the problem using as initial guess approximate solutions from previous treatments. The robustness of the procedure is tested with synthetic data, followed by an experimental example. The developed approach performs robustly over different synthetic and experimental data, comparing favorably with the reported methods.

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.

Attempting to display the contents of an HDF5 file containing fixed-length UTF-8 encoded strings results in an unexpected error in MATLAB.

For example, the following code

  h5disp('myHDF5FileWithFixedLenUTF8Strings.h5')

returns this error:

Error using h5infoc
UTF-8 encoding is only supported for variable length strings.

Error in h5info (line 108)
hinfo = h5infoc(filename,location, useUtf8);

Error in h5disp>display_hdf5 (line 121)
hinfo = h5info(options.Filename,options.Location);

Error in h5disp (line 99)
display_hdf5(options);

Structure-mining finds and returns the best-fit structures from structural databases given a measured pair distribution function data set. Using databases and heuristics for automation it has the potential to save experimenters a large amount of time as they explore candidate structures from the literature.

At a recent LAUSD District 3 school board debate, teachers dressed as FBI agents in protest of board member Tamar Galatzan's support of the iPad program.; Credit: Annie Gilbertson/KPCC

As the city's March 3 primary election draws near, Los Angeles Unified school board candidates are blasting incumbents for the controversial iPad program.

Opponents sharply criticized the $1.3 billion bond-funded program at a debate Tuesday in West San Fernando Valley, where District 3 school board member Tamar Galatzan was elected in 2007.

"Galatzan said the district is going in the right direction," declared candidate Carl Petersen, a parent and businessman. "I don’t know how anyone can look at the events of the past year and come to that conclusion."

RELATED: LAUSD District 5 school board candidates face off in debate

The program attracted national attention last December when the FBI raided district offices and carted off 20 boxes of bids, evaluations and correspondences with executives at Apple and its subcontractor Pearson, the manufacturer of the learning software loaded on to each device. The investigation is ongoing.

At the debate, teachers dressed in dark windbreakers with FBI plastered on the back in protest to Galatzan's support of the program. (They have not held similar demonstrations at election events in East Los Angeles' District 5, where Bennett Kayser, a teacher union ally, is running for re-election.)

Tom Richards, a Granada Hills parent, said he considers the iPad program a central issue as he weighs candidates.

"I think it's absolutely ridiculous," Richards said. "I don't believe that's a good way to spend the money that they have. Looking at some really fundamental needs — we don't have a librarian, but we want to give iPads?" 

Galatzan was an early advocate for more technology in the classroom; it was her goal even before the iPad was on the market.

"There is a whole world out there that can be accessed through technology, and we need to take advantage of that," Galatzan told KPCC.

Her advocacy of technology hasn't always been controversial. Galatzan points to her 2010 initiative to fund school computer labs with a settlement from Microsoft.

The school board's support of the iPad program varied the first year, but waned in August after KPCC published a series of emails showing district administrators had close ties with Pearson, calling into question whether the bidding process was fair. Problems with the rollout of the devices and the effectiveness of the software they contained also eroded support for the program.

Still, school board members unanimously approved more iPad purchases after the FBI investigation came to light. Superintendent Ramon Cortines said the tablets were necessary for new digital state tests scheduled this spring and offered to purchase them under a different contract with Apple to avoid complications involving the federal probe.

If the candidates' positions are a measure of support for the program, it's unpopular at best.  All of Galatzan's opponents are against it. 

When asked in a KPCC election survey conducted if he supported the iPad program, Scott Schmerelson, a retired administrator and District 3 contender, responded: "Not when you are paying for them from LAUSD Bond Money! The taxpayers generously supported the bond issue with the belief that the money would be used to repair and modernize our schools." 

Candidate Ankur Patel said in his answer to the survey, "I oppose the LAUSD’s iPad program. Throughout the program, important questions were not asked enough, and when they were, they were not answered properly."

Filiberto Gonzalez, another Galatzan challenger, said of the iPad project: "It was a mistake and ill-conceived from the very beginning. As was noted in the report by the U.S. Department of Education last month, the Common Core Technology Project (iPad program) lacked 'established metrics of success' and 'was difficult to show the impact of the investment.'

Elizabeth Badger Bartels is also running for the District 3 seat, but did not respond to the survey by deadline.

For more information on the school board candidates' positions and their backgrounds, read KPCC's 2015 Los Angeles primary election guide.

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

Yaya Wang
Apr 7, 2020; 133:jcs228072-jcs228072
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On August 17, 2017, scientists made history with the first direct observation of a merger between two neutron stars. It was the first cosmic event detected in both gravitational waves and the entire spectrum of light, from gamma rays to radio emissions. The impact also created a kilonova -- a turbocharged explosion that instantly forged several hundred planets’ worth of gold and platinum. The observations provided the first compelling evidence that kilonovae produce large quantities of heavy metals, a finding long predicted by theory. Astronomers suspect that all of the gold and platinum on Earth formed as a result of ancient kilonovae created during neutron star collisions. Based on data from the 2017 event, first spotted by the Laser Interferometer Gravitational-wave Observatory (LIGO), astronomers began to adjust their assumptions of how a kilonova should appear to Earth-bound observers. A team of scientists reexamined data from a gamma-ray burst spotted in August 2016 and found new evidence for a kilonova that went unnoticed during the initial observations.

Image credit: NASA/ESA/E. Troja

Source: Peter Krauth for Streetwise Reports   05/05/2020

Gold has the wind in its sails. Its price in U.S. dollars is up an astounding 62% since late 2015, with a 33% gain in just the past year, outpacing all major assets.

And investors are only just starting to get interested.

The Covid-19 pandemic and its economic impact is a major catalyst. More than $8 trillion in global fiscal stimulus has already been committed to alleviate unemployment and support struggling businesses. But it's almost certainly not enough.

"That sets up the perfect storm for X-Terra, making it a Strong BUY. With its outstanding initial drill results at the Grog property and the remarkable potential at Troilus East, I can easily see XTT double its market cap in the next 6-12 months, perhaps sooner."

Near-zero interest rates combined with unprecedented money-printing are creating ideal conditions for the ultimate inflation hedge: gold. And that's making junior gold equities the go-to sector as the metal rapidly approaches its all-time high.

Amidst all this, one junior gold explorer with a nascent exploration breakthrough could soar as the gold bull market moves into its next phase.

New Brunswick Could Host Large New Gold System

Bona fide new discoveries with district potential are rare. Participating early in one could be a life-changing event.

That's what makes X-Terra Resources Inc. (XTT:TSX.V; XTRRF:OTCMKTS; XTR:FSE) such a compelling investment right now. XTT shares are a Strong BUY, with the potential to double in the next 6–12 months.

Here's my rationale…

Its top two projects are in neighboring Canadian provinces, both among the highest-ranking gold mining jurisdictions globally.

In early March, X-Terra completed its inaugural drill program over the Grog and Northwest Properties in the province of New Brunswick along the McKenzie Fault. It comprised 1,904 meters over 16 holes.

Initial results are in, and they're impressive.

Hole GRG-20-012 identified gold mineralization over a significant width. One interval averaged 0.41 g/t gold over 36 meters, including 0.46 g/t gold over 31 meters and 7.59 g/t gold over 0.6 meters. The company points out that 6 of the remaining holes returned mineralized intervals between 0.1 g/t gold and 0.35 g/t gold.

X-Terra President and CEO Michael Ferreira said, "This is a significant exploration breakthrough, and reinforces our expectations that a large epithermal system is present. While more in-depth geological work, which includes drilling is needed, it remains evident that the 11 holes (1570 metres drilled) only covered a very small fraction of the targeted environment. Reaching a significant mineralized interval this shallow (From 107 metres to 143 metres, in GRG-20-012) is a milestone we were relentlessly pursuing after completing the limited field exploration programs based predominately on roadside trenching. The information obtained in this program will allow the detailed follow up on the Grog Target but also allow the company to refine and generate more high priority targets carrying the same geological characteristics to that of the Grog target. This provides a monumental shift moving forward."

HIGHLIGHTS FROM HOLE GRG-20-012

The beauty of this impressive drill hole intercept is its signature, which contains a wide alteration halo associated with sulfidation and quartz veining. Based on the geophysical data, they will be able to track the gold bearing system at depth using an advanced data processing approach combined with their geological knowledge.

The exploration team can now use the signature to formulate similar drill targets elsewhere on the property, with the potential for similar results.

Clearly, X-Terra's diligent, methodical and scientific approach has begun to pay off. Experience combined with a skilled overlay of induced polarization, magnetic surveys, sampling and trenching helped achieve this recent success.

Back in 2017, the company discovered high grade gold occurrences. That was followed up with further work, which delivered extensive anomalies scattered over roughly 30 km along the McKenzie Gulch regional Fault.

Their geologists then engaged a quick exploration cycle over the next 18 months, starting with an orientation geophysics survey, followed by trenching and drilling. They now have an initial model in progress, which involves an extensive magmatic hydrothermal system, and the targets generated so far are pluri-kilometric.

X-Terra is contemplating that it could be onto a brand new regional gold trend.

Such outstanding recent drill intercepts make for an even more exciting outlook. That's because future exploration targets will be chosen with a better understanding of the geological sequence. And that should improve the odds of more successful drill results.

But perhaps the biggest takeaway from hole GRG-20-012 is the suggestion that it demonstrates real potential for a large epithermal system. And that could mean a whole lot of gold lies beneath, something further exploration will answer.

Quebec Offers Huge Promise Near Large Developing Gold Mine

Despite the exciting outlook offered by the Grog area located in New Brunswick, X-Terra is far from being a one-trick pony.

Also bursting with massive untapped potential is the Troilus East Property, located in north-central Quebec.

X-Terra's Troilus East project is immediately adjacent to Troilus Gold Corp.'s former producing gold-copper mine. Even after 15 years of historic production, the Troilus Gold Project currently boasts 4.71 million ounces of gold equivalent in the Indicated category, plus 1.76 million ounces of gold equivalent in the Inferred category.

Early last year, X-Terra announced the completion of a high-resolution magnetic survey on the Troilus-East property. Management continues to advance the project, using the same diligent and methodical scientific approach that has brought success to the Grog discovery. XTT will be using magnetic signatures to perform follow-up work, looking to identify geological contexts with characteristics similar to those of the Troilus gold-copper mineral deposit.

Since tripling its land position, X-Terra has locked up the largest adjacent land claims to Troilus Gold of any public company.

That's exciting, as Troilus Gold is considered by some as the largest—or at least one of the largest—undeveloped gold deposits in North America. And that could well make X-Terra a future target should Troilus Gold or other players look to lock up more of the adjacent land.

People and Projects Offer Massive Potential

As is often the case, people are as important to a junior explorer's success as its properties. As a former professional motorcycle racer, X-Terra President and CEO Michael Ferreira saw the potential of resource exploration to create immense value for shareholders. Now living full-time in the Quebec mining town of Rouyn Noranda, Ferreira has judiciously curated a winning team.

Dr. Michael Byron, Ph.D., P.Geo. and a company director, has thirty years of field work, research and senior management positions across gold, base-metals, diamond and gemstone exploration. He was instrumental in re-discovering Falco Resources' leading asset, the Horne 5 deposit.

A testament to the quality of management is XTT's rare combination of tight share structure and quality projects. On a fully diluted basis, there are just 80 million shares outstanding, with management's skin in the game representing 6% of ownership.

As I see it, X-Terra's combination of quality management with exceptional high potential projects is starting to bear fruit. Its New Brunswick-located Grog and Northwest project, along with its Troilus East project located in Quebec, are highly prospective.

Given that the global fiscal and monetary response to the coronavirus has generated a tsunami of money printing, the gold market is kicking into high gear.

That sets up the perfect storm for X-Terra, making it a Strong BUY. With its outstanding initial drill results at the Grog property and the remarkable potential at Troilus East, I can easily see XTT double its market cap in the next 6–12 months, perhaps sooner.

In my view these are the early days of a string of successful exploration results, making XTT.V radically undervalued, for now.

Peter Krauth is a former portfolio adviser and a 20-year veteran of the resource market, with special expertise in energy, metals and mining stocks. He has been editor of a widely circulated resource newsletter, and contributed numerous articles to Kitco.com, BNN Bloomberg and the Financial Post. Krauth holds a Master of Business Administration from McGill University and is headquartered in resource-rich Canada.

Disclosure:
1) Peter Krauth: I, or members of my immediate household or family, own shares of the following companies mentioned in this article: None. I personally am, or members of my immediate household or family are, paid by the following companies mentioned in this article: X-Terra Resources. My company has a financial relationship with the following companies mentioned in this article: None. I determined which companies would be included in this article based on my research and understanding of the sector.
2) The following companies mentioned in this article are billboard sponsors of Streetwise Reports: X-Terra Resources. Click here for important disclosures about sponsor fees. As of the date of this article, an affiliate of Streetwise Reports has a consulting relationship with X-Terra Resources. Please click here for more information. An affiliate of Streetwise Reports is conducting a digital media marketing campaign for this article on behalf of X-Terra Resources. Please click here for more information. The information provided above is for informational purposes only and is not a recommendation to buy or sell any security.
3) Statements and opinions expressed are the opinions of the author and not of Streetwise Reports or its officers. The author is wholly responsible for the validity of the statements. The author was not paid by Streetwise Reports for this article. Streetwise Reports was not paid by the author to publish or syndicate this article. Streetwise Reports requires contributing authors to disclose any shareholdings in, or economic relationships with, companies that they write about. Streetwise Reports relies upon the authors to accurately provide this information and Streetwise Reports has no means of verifying its accuracy.
4) This article does not constitute investment advice. Each reader is encouraged to consult with his or her individual financial professional and any action a reader takes as a result of information presented here is his or her own responsibility. By opening this page, each reader accepts and agrees to Streetwise Reports' terms of use and full legal disclaimer. This article is not a solicitation for investment. Streetwise Reports does not render general or specific investment advice and the information on Streetwise Reports should not be considered a recommendation to buy or sell any security. Streetwise Reports does not endorse or recommend the business, products, services or securities of any company mentioned on Streetwise Reports.
5) From time to time, Streetwise Reports and its directors, officers, employees or members of their families, as well as persons interviewed for articles and interviews on the site, may have a long or short position in securities mentioned. Directors, officers, employees or members of their immediate families are prohibited from making purchases and/or sales of those securities in the open market or otherwise from the time of the interview or the decision to write an article until three business days after the publication of the interview or article. The foregoing prohibition does not apply to articles that in substance only restate previously published company releases. As of the date of this article, officers and/or employees of Streetwise Reports LLC (including members of their household) own securities of X-Terra Resources, a company mentioned in this article.

( Companies Mentioned: XTT:TSX.V; XTRRF:OTCMKTS; XTR:FSE, )

The 2020 State of Disbursements: APAC Outlook Report by Rapyd...

Evidence exists linking three cancers and two other health problems with chemicals used in herbicides in the Vietnam War, a committee of the Institute of Medicine (IOM) has concluded.

A bold national initiative is needed to reduce the enormous health burden of sexually transmitted diseases (STDs) in the United States, according to a new report from a committee of the Institute of Medicine.

Insufficient evidence exists to support claims that taking megadoses of dietary antioxidants, such as selenium and vitamins C and E, or carotenoids, including beta-carotene, can prevent chronic diseases, says the latest report on Dietary Reference Intakes (DRIs) from the Institute of Medicine of the National Academies.

To meet the bodys daily energy and nutritional needs while minimizing risk for chronic disease, adults should get 45 percent to 65 percent of their calories from carbohydrates, 20 percent to 35 percent from fat, and 10 percent to 35 percent from protein.

The vast majority of healthy people adequately meet their daily hydration needs by letting thirst be their guide, says the newest report on nutrient recommendations from the Institute of Medicine of the National Academies.

Use of protective face coverings will be one of many strategies used to slow or prevent transmission of the flu virus in the event of a pandemic, even though scientific evidence about the effectiveness of inexpensive, disposable medical masks and respirators against influenza is limited.

The high rate of premature births in the United States constitutes a public health concern that costs society at least $26 billion a year, according to a new report from the Institute of Medicine of the National Academies.