At the Smithsonian’s National Museum of Natural History, curator of arachnids and myriapods Hannah Wood has examined and analyzed hundreds of pelican spiders both in the field […]

The post Pelican spiders: Ancient assassins that eat their own kind appeared first on Smithsonian Insider.

Curator Taína Caragol gives you a tour of a portrait of the late sculptor Luis Jiménez by Gaspar Enríquez at our National Portrait Gallery

The post Portraiture and the Mexican American Experience appeared first on Smithsonian Insider.

Yesterday, we heard about the hyper-loop, a system that could get you from L.A. to San Francisco in about 30 minutes without losing your eyeballs.

Steve Julian: Business analyst Mark Lacter, that might come in handy given how crowded California's air corridor has become...

Mark Lacter: We'll talk about the hyper-loop in a moment, Steve, but yes, the L.A.-to-San Francisco air route is the busiest in the U.S., and it's already the most competitive.  We're talking about more than 50 flights a day, which - if you spread them out between six in the morning and 10:30 at night - there'd be one flight every 20 minutes.  But, Delta obviously thinks there's room for more because it's announced an hourly shuttle between the two cities.  That's another 14 daily flights beginning September 3.  The airline will be using a somewhat smaller jet, and it sounds as if the focus will be on the business traveler, with free newspapers, wine, and beer.

Julian: How much will it cost, do we know?

Lacter: As usual, it's a lot cheaper if you make an advance purchase, but if you're buying your tickets at the last minute - which is what a lot of business travelers do - roundtrip runs a hefty $430.  Actually, this Bay Area shuttle is just the latest effort by Delta to expand out of LAX, which is different from other major airports in that it doesn't have any one airline that dominates (United has a slight edge in market share over American, with Delta about three percentage points behind).  American also has been adding flights out of LAX.

Julian: Sounds like the airline business is improving...

Lacter: That's what happens when you pack planes to the absolute max, which is bad news for travelers being crammed into coach seats.  But it's good news for LAX, which continues to be the airport of choice among airlines looking to add service - matter of fact, domestic passenger traffic was up almost 8 percent in June compared with a year earlier.  Some of those gains might be at the expense of service elsewhere - most especially Ontario Airport, which has seen a big exodus among airlines and passengers.  Ontario city officials have been trying to regain control of the airport, which has been operated by the city of Los Angeles.

Julian: Back to the hyper-loop - is this kind of transport possible?

Lacter: Well, it's the brainchild of billionaire Elon Musk, and you never say never with this guy.  He started the electric car company Tesla and the private space company Space X.  The hyper-loop is a high-speed system of passenger pods that would travel on a cushion of air (think of air hockey table).  The pods would travel at more than 700 miles per hour, but they wouldn't result in sonic booms that severely restricted the Concorde aircraft.  Of course, anything that promises super-speed travel is bound to get people talking - and, from what the physics professors are saying, the Musk idea seems feasible.

Julian: How would its cost compare to the bullet train?

Lacter: He says a lot cheaper.  The price tag on the train is $70 billion at last check; Musk says he can do his for $6 billion.  But, the issue isn't so much the cost or even the technology, but the politics.  As a rule, governments do not think outside the box, and that's what a project like this is all about.  Already, you have bullet train supporters saying that the hyper-loop is impossible, but what they're really saying is we have a lot riding on the train, and we don't want this guy to mess it up.

Julian: But, how much demand is there for high-speed transport?

Lacter: You'd think there would be a lot, but when Boeing came up with a nifty idea for a souped-up plane that would shave almost an hour from L.A. to New York, the airlines said no because it would require more fuel - and that would mean raising fares.  Musk says his system would be a lot cheaper than traveling by plane, which could be a game changer in the attitudes about going places.  But, those attitudes won't change until the thing is actually built, and that can't realistically happen until attitudes change.  That's the ultimate problem.

Julian: Hence, why we're content to squeeze into coach.

Lacter: Yep.

Mark Lacter is a contributing writer for Los Angeles Magazine and writes the business blog at LA Observed.com.

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

Latinus 9333 is the Latin translation of the so-called Tacuinum sanitatis, a medieval handbook on wellness written in Arabic by the 11th-century physician ibn Butlan. It deals with factors influencing human health: from the air, the environment and food, to physical exercise and sexual activity.

The post Medieval book is important resource for how plants were once collected, treated and used appeared first on Smithsonian Insider.

Now, for the first time ever, researchers at the Smithsonian Tropical Research Institute are able to track the routes of these creatures by gluing tiny transmitters to the backs of individual bees.

The post Transmitters unveil long-distance movements of orchid bees appeared first on Smithsonian Insider.

The Encyclopedia of Life is an unprecedented global effort to document all 1.8 million named species of animals, plants and other forms of life on Earth. For the first time in the history of the planet, scientists, students, and citizens will have multi-media access to all known living species, even those that have just been discovered. The Field Museum of Natural History, Harvard University, Marine Biological Laboratory, Smithsonian Institution, and Biodiversity Heritage Library joined together to initiate the project, bringing together species and software experts from across the world. Lean more at www.eol.org

The post The Encyclopedia of Life is a global effort to document all 1.8 million named species of animals, plants and other life forms on Earth appeared first on Smithsonian Insider.

Recent analysis using DNA sequencing of ancient Roman pills found aboard a ship that sank in Italy’s Gulf of Baratti between 140 -120 B.C, has revealed that the medicines consist of material from simple garden plants, namely carrot, radish, parsley, celery, wild onion and cabbage.

The post DNA sequencing reveals simple vegetables in ancient Roman medicines appeared first on Smithsonian Insider.

The Center for Tropical Forest Science, which manages a global network of temperate and tropical forest research plots, will utilize the funds to conduct workshops in the Americas and Asia to investigate how taxonomic, functional, and genetic dimensions of diversity affect tree communities and their resilience to global change.

The post Center for Tropical Forest Science receives grant to study diversity of tree communities appeared first on Smithsonian Insider.

Nearly 60 million years ago rainforests prospered at temperatures that were 3-5 degrees higher and at atmospheric carbon dioxide levels 2.5 times today’s levels.

The post Plant diversity in tropical forests increased during ancient global warming event appeared first on Smithsonian Insider.

The post Cool science is being carried out on a Smithsonian island in the Panama Canal appeared first on Smithsonian Insider.

The discovery of starch granules in the calculus on Neandertal teeth provides direct evidence that they made sophisticated, thoughtful food choices and ate more nutrient-rich plants, for example date palms, legumes and grains such as barley.

The post Starch grains found on Neandertal teeth debunks theory that dietary deficiencies caused their extinction appeared first on Smithsonian Insider.

This 1950 Federal Bureau of Investigation photo shows T. Dale Stewart, M.D., Curator of Physical Anthropology, in his office at the Smithsonian’s National Museum of […]

The post Tragedy, towers, and romance at the Smithsonian appeared first on Smithsonian Insider.

Bird species in rainforest fragments in Brazil that were isolated by deforestation first disappeared and then reappeared during the next quarter-century.

The post “Extinct” birds reappear in rainforest fragments in Brazil appeared first on Smithsonian Insider.

Recent botanical exploration efforts in the rugged Marquesas Islands (French Polynesia) have increased the known flora of the archipelago by an impressive 20 percent. Field research and collecting in conjunction with the Vascular Flora of the Marquesas Islands and Flore de la Polynesie française projects have yielded 62 new species of ferns and flowering plants bringing the total native species to 360, of which 18 are newly described and illustrated in a special issue of PhytoKeys.

The post Marquesas Islands in French Polynesia yield 18 new species of rare ferns and flowering plants appeared first on Smithsonian Insider.

A new study shows that as climate change enhances tree growth in tropical forests, the resulting increase in litterfall could stimulate soil micro-organisms leading to a release of stored soil carbon.

The post Increased tropical forest growth may result in release of stored carbon in the soil appeared first on Smithsonian Insider.

People living along the coast of Peru were eating popcorn 2,000 years earlier than previously reported and before ceramic pottery was used there, according to a new paper in the Proceedings of the National Academy of Sciences.

The post Ancient popcorn discovered in Peru appeared first on Smithsonian Insider.

The post Smithsonian paleobotanist Scott Wing discusses ancient global warming & what it portends for the future appeared first on Smithsonian Insider.

The move enhances coordination efforts for the 46-plot research network, which partners with more than 75 institutions in 21 countries.

The post Global forest science research center moves from Harvard to the National Museum of Natural History, Washington, D.C. appeared first on Smithsonian Insider.

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.

A new genetic analysis has revealed that many Amazon tree species are likely to survive human-caused climate warming in the coming century, contrary to previous findings that temperature increases would cause them to die out.

The post Warming climate unlikely to cause near-term extinction of ancient Amazon trees, study says appeared first on Smithsonian Insider.

Hidden in the thick foliage of tropical forests a subfamily of colorful beetles–the Chrysomelidae–may be hiding the secrets to the earliest stages of social behavior. […]

The post Beetle moms show clear signs of maternal instincts and care appeared first on Smithsonian Insider.

An ancient new player has entered the debate over global warming and it is pink. Labrador fishermen call them “red rocks” because underwater they resemble […]

The post Ancient algal ‘tree rings’ show dramatic decline in Arctic and sub-Arctic sea ice 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.

At the approach of a hungry parrot snake, a tree frog egg transforms from a haven to a prison. With no parent to offer protection, […]

The post Mystery solved: frogs use snout glands in emergency jail break appeared first on Smithsonian Insider.

Fort Pierce, Fla. – Fall in southern Florida is festival season: when the weather stops being oppressively hot and 70 degrees is positively autumnal.  On […]

The post Annual Smithsonian-led science festival draws crowds in Fort Pierce, Florida appeared first on Smithsonian Insider.

By charting the slopes and crags on animals’ teeth as if they were mountain ranges, scientists at the Smithsonian’s National Museum of Natural History have […]

The post 3D study of teeth in modern mammals opens window to extinct animal diets appeared first on Smithsonian Insider.

Coastal marine environments are impacted by human disturbance. Dock pilings allow MarineGEO researchers to study these impacts in a standardized way around the world to […]

The post The incredible marine diversity under boat docks appeared first on Smithsonian Insider.

If you’ve seen the movie Jurassic Park, you know that amber played a significant role in rebuilding a lost world: A mosquito trapped within its […]

The post Resin from shipwreck hints at trade routes and botany of ancient Asia appeared first on Smithsonian Insider.

For many Californians, last year’s wet winter triggered a case of whiplash. After five years of drought, rain from October 2016 to February 2017 broke […]

The post In San Francisco, one wet winter can switch up Bay’s invasive species appeared first on Smithsonian Insider.

No green thumb? You don’t need to water these dazzling orchids to enjoy them. More than 8,000 living specimens in the Smithsonian Gardens Orchid Collection […]

The post See thousands of orchids in incredible detail in the Smithsonian’s newly digitized collection appeared first on Smithsonian Insider.

An elementary method is described for finding the coordination sequences for a tiling, based on coloring the underlying graph. The first application is to the two kinds of vertices (tetravalent and trivalent) in the Cairo (or dual-32.4.3.4) tiling. The coordination sequence for a tetravalent vertex turns out, surprisingly, to be 1, 4, 8, 12, 16, …, the same as for a vertex in the familiar square (or 44) tiling. The authors thought that such a simple fact should have a simple proof, and this article is the result. The method is also used to obtain coordination sequences for the 32.4.3.4, 3.4.6.4, 4.82, 3.122 and 34.6 uniform tilings, and the snub-632 tiling. In several cases the results provide proofs for previously conjectured formulas.

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.

In a Model block, if the instance-specific value of a model argument has an anonymous structure type, an update diagram reports an error when there are multiple bus types that match that anonymous structure type.This bug exists in the following release(s):
R2020a

This bug has a workaround

Interested in Upgrading?

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);

When creating a System Composer architecture model, if the following functions are called with an invalid or missing stereotype, it can cause the model to get corrupted and might lead to a MATLAB crash:

• addComponent
• addPort
• connect

Simulink might produce an incorrect sorted order for a model that meets all of the following conditions:

• The model contains blocks from the SoC Blockset
• The Signal logging option is selected in the model configuration set
• Signals using asynchronous sample time are configured for logging

If you try to open a text file with UTF-16 or UTF-32 encoding, the Import Tool displays a warning message stating that the encoding is not supported.  If you continue to load the file anyways, it is opened with UTF-8 encoding, and the file may not be displayed or imported as expected.This bug exists in the following release(s):
R2020a

This bug has a workaround

Interested in Upgrading?

In certain scenarios, a Subsystem Reference block changes its position. It can happen during: 

1. Loading of top model which contains the Subsystem Reference block 
2. Synchronization of Subsystem Reference block's contents
3. Converting a subsystem to Subsystem Reference block 

An error in an equation in the paper by Song et al. [Acta Cryst. (2019), C75, 1353–1358] is corrected.

An operationally simple and time-efficient approach has been developed for the synthesis of racemic N-substituted 3-(2-aryl-2-oxoeth­yl)-3-hy­droxy­indolin-2-ones by a piperidine-catalysed aldol reaction between aryl methyl ketones and N-alkyl­isatins. These aldol products were used successfully as strategic inter­mediates for the preparation of N-substituted (E)-3-(2-hetaryl-2-oxo­ethyl­idene)indolin-2-ones by a stereoselective dehydration reaction under acidic conditions. The products have all been fully characterized by 1H and 13C NMR spectroscopy, by mass spectrometry and, for a representative selection, by crystal structure analysis. In each of (RS)-1-benzyl-3-hy­droxy-3-[2-(4-meth­oxy­phen­yl)-2-oxoeth­yl]indolin-2-one, C24H21NO4, (Ic), and (RS)-1-benzyl-3-{2-[4-(di­methyl­amino)­phen­yl]-2-oxoeth­yl}-3-hy­droxy­indolin-2-one, C25H24N2O3, (Id), inversion-related pairs of mol­ecules are linked by O—H⋯O hydrogen bonds to form R22(10) rings, which are further linked into chains of rings by a combination of C—H⋯O and C—H⋯π(arene) hydrogen bonds in (Ic) and by C—H⋯π(arene) hydrogen bonds in (Id). The mol­ecules of (RS)-1-benzyl-3-hy­droxy-3-[2-oxo-2-(pyridin-4-yl)eth­yl]indolin-2-one, C22H18N2O3, (Ie), are linked into a three-dimensional framework structure by a combination of O—H⋯N, C—H⋯O and C—H⋯π(arene) hydrogen bonds. (RS)-3-[2-(Benzo[d][1,3]dioxol-5-yl)-2-oxoeth­yl]-1-benzyl-3-hy­droxy­indolin-2-one, C24H19NO5, (If), crystallizes with Z' = 2 in the space group Poverline{1} and the mol­ecules are linked into com­plex sheets by a combination of O—H⋯O, C—H⋯O and C—H⋯π(arene) hydro­gen bonds. In each of (E)-1-benzyl-3-[2-(4-fluoro­phen­yl)-2-oxo­ethyl­idene]indolin-2-one, C23H16FNO2, (IIa), and (E)-1-benzyl-3-[2-oxo-2-(thiophen-2-yl)ethylidene]indolin-2-one, C21H15NO2S, (IIg), the mol­ecules are linked into simple chains by a single C—H⋯O hydrogen bond, while those of (E)-1-benzyl-3-[2-oxo-2-(pyridin-4-yl)ethyl­idene]indolin-2-one, C22H16N2O2, (IIe), are linked by three C—H⋯O hydrogen bonds to form sheets which are further linked into a three-dimensional structure by C—H⋯π(arene) hydrogen bonds. There are no hydrogen bonds in the structures of either (E)-1-benzyl-3-[2-(4-meth­oxy­phen­yl)-2-oxo­ethyl­idene]indolin-2-one, C24H19NO3, (IIc), or (E)-1-benzyl-5-chloro-3-[2-(4-chloro­phen­yl)-2-oxo­ethyl­idene]indolin-2-one, C23H15Cl2NO2, (IIh), but the mol­ecules of (IIh) are linked into chains of π-stacked dimers by a combination of C—Cl⋯π(arene) and aromatic π–π stacking inter­actions.

The positional change of nitro­gen-7 of the RNA constituent guanosine to the bridgehead position-5 leads to the base-modified nucleoside 5-aza-7-de­aza­guanosine. Contrary to guanosine, this mol­ecule cannot form Hoogsteen base pairs and the Watson–Crick proton donor site N3—H becomes a proton-acceptor site. This causes changes in nucleobase recognition in nucleic acids and has been used to construct stable `all-purine' DNA and DNA with silver-mediated base pairs. The present work reports the single-crystal X-ray structure of 7-iodo-5-aza-7-de­aza­guanosine, C10H12IN5O5 (1). The iodinated nucleoside shows an anti conformation at the glycosylic bond and an N conformation (O4'-endo) for the ribose moiety, with an anti­periplanar orientation of the 5'-hy­droxy group. Crystal packing is controlled by inter­actions between nucleobase and sugar moieties. The 7-iodo substituent forms a contact to oxygen-2' of the ribose moiety. Self-pairing of the nucleobases does not take place. A Hirshfeld surface analysis of 1 highlights the contacts of the nucleobase and sugar moiety (O—H⋯O and N—H⋯O). The concept of pK-value differences to evaluate base-pair stability was applied to purine–purine base pairing and stable base pairs were predicted for the construction of `all-purine' RNA. Furthermore, the 7-iodo substituent of 1 was functionalized with benzo­furan to detect motional constraints by fluorescence spectroscopy.

Brock Lesnar after losing his championship in the main event of Wrestlemania 31.; Credit: WWE

World Wrestling Entertainment held their annual Wrestlemania show last weekend in Northern California, the culmination of another year's worth of spectacle. According to the company, it was their highest grossing event of all-time, drawing $12.6 million, with an official attendance placing it fifth on their list of all-time crowds for the event. The show was headlined by former UFC Heavyweight Champion Brock Lesnar going up against up-and-coming star (and a relative of Dwayne "The Rock" Johnson) Roman Reigns.

WWE Network

It comes at a time when the company has embarked on a new way of making money: their over-the-top online programming provider, the WWE Network, where fans can pay $9.99 a month to see programming including what formerly used to cost $45 for most shows and $60 for Wrestlemania. They're one year in now on gambling that enough fans will want the Network that it will ultimately make them more money in the long-term, despite losing that pay-per-view revenue. Wall Street doesn't appear to be buying it — after announcing the day after Wrestlemania that they'd hit 1.3 million subscribers, WWE's stock took a significant loss.

"The point is not whether it's real or if it's staged. The point is, are you entertained by it, or not?" former WWE announcer Jim Ross told KPCC in an interview. WWE is looking for more fans to be entertained enough to plunk down $9.99 for all the pro wrestling content they want.

NXT

They're also in a transitional period with their audiences. They've launched a new show that's only on the Network called "NXT," turning their minor league into a program targeting hardcore pro wrestling fans with a different style of show than the more family-targeted "Raw" and "Smackdown." It's also where they groom potential future stars, many of whom seem to break the mold of some of the traditional stars on WWE's main roster.

They're signing up talent that's been getting buzz on the independent circuits, trying to create their own underground movement that hopefully spells money, and taking the NXT brand on tour for the first time. On the Raw after Wrestlemania, several NXT stars made their debut on the main roster. That follows a sell-out crowd (albeit at a smaller 5,000 seat venue) on the Friday night before Wrestlemania for a non-televised NXT show.

Give Divas a chance

WWE also faces cultural forces pushing them in new directions, including a difference in how society deals with gender. When WWE executive Stephanie McMahon, daughter of the famed Vince McMahon, tweeted in support of Patricia Arquette's speech calling for greater equality for women at the Academy Awards, one of their own wrestlers, AJ Lee, responded by publicly calling Stephanie McMahon out on Twitter for not promoting the women in her own company equally and paying them less than the male stars.

AJ tweet 1

AJ tweet 2

Of course, the women in the company aren't given the same prominence as the men in part because it's felt that they won't make the company as much money. Still, it forced WWE's hand and Stephanie McMahon and the company as a whole publicly embraced the idea of giving the women (who WWE brands as "divas") a chance with the Give Divas A Chance movement (and accompanying trending hashtag).

What's next

The women have been promoted nearly equal to the men in that underground NXT league, but only time will tell if it continues to trickle upward. Wrestlemania didn't seem to show huge promise of that happening, with the one women's match of the show only getting a few minutes in the ring. However, the show also included a high-profile storyline with UFC female fighter and champion Ronda Rousey alongside the Rock, going up against Stephanie McMahon and Triple H, so there appears to be the room for women in prominent positions when they have the right storyline.

Whether WWE is able to wade through these forces of change to make more money — and perhaps regain some of the cultural currency that they've lost since becoming a monopoly and purchasing their top competition in 2001 — remains to be seen. They've stayed relatively steady despite a challenge from UFC, which many see as being what pro wrestling would be like if WWE didn't present fictional  They'll have to hope that giving new stars, including "divas," a chance will take them to another level.

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

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.