Spending time in a beautiful garden can be transformative. In fact, some visitors to the Smithsonian’s Mary Livingston Ripley Garden in Washington D.C. have taken […]

The post Monarch Butterflies Make the Most of the Smithsonian’s Gardens appeared first on Smithsonian Insider.

Rainforests on infertile wet soils support more than half of all plant species. Shrublands on infertile dry soils in southwestern Australia, jokingly called “knee-high tropical […]

The post Microbes rule in ‘knee-high tropical rainforests’ appeared first on Smithsonian Insider.

The Smithsonian-Mason School of Conservation offers a range of compelling residential, hands-on, interdisciplinary programs in conservation biology for undergraduate and graduate students and professionals at […]

The post Field Research: Smithsonian-Mason School of Conservation appeared first on Smithsonian Insider.

Finding a mouse in your morning coffee might give you an unwelcome jolt, but there’s a strong connection between small mammals, birds and the plantations […]

The post Of mice and macchiato: Bird Friendly coffee gives a paw-up to small mammals as well appeared first on Smithsonian Insider.

Named for Charles Darwin, the only known specimen of a newly discovered beetle, Darwinylus marcosi, died in a sticky battle in a gob of tree […]

The post Beetle and pollen trapped in 105 million-year-old amber reveal fourth major pollination mode in mid-Mesozoic appeared first on Smithsonian Insider.

On Earth Day weekend, the Smithsonian will convene the first Earth Optimism Summit, a three-day event featuring more than 150 scientists, thought leaders, philanthropists, conservationists […]

The post Smithsonian To Convene Earth Optimism Summit April 21–23 appeared first on Smithsonian Insider.

We can save frogs with science. Release trials in the wild begin this spring. On Earth Day weekend, the Smithsonian is convening the Earth Optimism […]

The post Earth Optimism Video: Frogs appeared first on Smithsonian Insider.

The global conservation movement has reached a turning point. We have documented the fast pace of habitat loss, the growing number of endangered and extinct […]

The post Earth Optimism: Change is Possible appeared first on Smithsonian Insider.

Earth Day is coming up, and this year, the Smithsonian has a different take on it. It has invited more than 150 scientists, thought leaders, […]

The post Earth Optimism Summit to showcase steady, positive gains in conservation 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.

The Smithsonian is celebrating Earth Day this month by hosting the first Earth Optimism Summit from April 21 to 23 in Washington, D.C. Its goal […]

The post The Smithsonian’s history is right in line with Earth Optimism appeared first on Smithsonian Insider.

This Earth Day weekend in Washington, D.C., the Smithsonian is convening the first Earth Optimism Summit. The three-day event, taking place April 21–23, will look […]

The post Earth Optimism: Smithsonian’s “Agua Salud” Project restores degraded land with forest appeared first on Smithsonian Insider.

Is it foolish to be optimistic about our environment and its future prospects? Every day, we hear dire warnings about the health of the planet […]

The post The Argument for Environmental Optimism: Opinion by Smithsonian Secretary David J. Skorton appeared first on Smithsonian Insider.

Ninety Limosa harlequin frogs (Atelopus limosus) bred in human care are braving the elements of the wild after Smithsonian scientists sent them out into the […]

The post Scientists Release Frogs Wearing Mini Radio Transmitters appeared first on Smithsonian Insider.

A tiny invasive insect from Asia might have an effect on Chesapeake Bay waters. The emerald ash borer is killing millions of ash trees in […]

The post Invasive ash borer found in Smithsonian Environmental Research Center forest; ash deaths may impact Chesapeake waters appeared first on Smithsonian Insider.

Camouflage is a valuable survival strategy—just ask a chameleon. Scientists have just discovered a new form of mimicry camouflage: beetles that hide by chewing beetle-shaped […]

The post For millions of years these tiny beetles have chewed their way out of sight appeared first on Smithsonian Insider.

 Mass Digitization of the living orchid collection maintained by Smithsonian Gardens.

The post Smithsonian Digitization: Orchid Collection 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.

This article aims to encourage practitioners, young and seasoned, by enhancing their structure-determination toolboxes with a selection of tips and tricks on recognizing and handling aspects of data collection, structure modelling and refinement, and the interpretation of results.

In the first reported crystal structure involving the potential ligand N,N',N''-tris­(2-pyridin­yl)-1,3,5-benzene­tricarboxamide, inter­molecular N—H⋯O hydrogen bonds link the mol­ecules via their amide groups into slanted ladder-like chains. Only two of the three amide groups in the mol­ecule are involved in hydrogen bonding, which influences the degree of out-of-plane twisting at each amide group.

The crystal structure of vanthoffite, Na6Mg(SO4)4, was redetermined and refined with anisotropic displacement parameters for all atoms. Here, for the first time, we give its detailed description.

The new copper(II) complex [CuLCl2]2, where L is a product of Schiff base condensation between methyl­amine and 2-pyridine­carbaldehyde, is built of discrete centrosymmetric dimers.

The asymmetric unit of the title compound contains two independent mol­ecules, consisting of perimidine and phenol units, which are linked through an N—H⋯O hydrogen bond. Intra­molecular O—H⋯N hydrogen bonds are observed in both independent mol­ecules.

The report of the Executive Committee for 2017 is presented.

Compared with X-rays, electron diffraction faces a crucial challenge: dynamical electron scattering compromises structure solution and its effects can only be modelled in specific cases. Dynamical scattering can be reduced experimentally by decreasing crystal size but not without a penalty, as it also reduces the overall diffracted intensity. In this article it is shown that nanometre-sized crystals from organic pharmaceuticals allow positional refinement of the hydrogen atoms, even whilst ignoring the effects of dynamical scattering during refinement. To boost the very weak diffraction data, a highly sensitive hybrid pixel detector was employed. A general likelihood-based computational approach was also introduced for further reducing the adverse effects of dynamic scattering, which significantly improved model accuracy, even for protein crystal data at substantially lower resolution.

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.

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.

This work considers the scaling properties characterizing the hyperuniformity (or anti-hyperuniformity) of long-wavelength fluctuations in a broad class of one-dimensional substitution tilings. A simple argument is presented which predicts the exponent α governing the scaling of Fourier intensities at small wavenumbers, tilings with α > 0 being hyperuniform, and numerical computations confirm that the predictions are accurate for quasiperiodic tilings, tilings with singular continuous spectra and limit-periodic tilings. Quasiperiodic or singular continuous cases can be constructed with α arbitrarily close to any given value between −1 and 3. Limit-periodic tilings can be constructed with α between −1 and 1 or with Fourier intensities that approach zero faster than any power law.

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

The asymmetric unit of the title compound, C17H14N2O, contains two independent molecules each consisting of perimidine and phenol units. The tricyclic perimidine units contain naphthalene ring systems and non-planar C4N2 rings adopting envelope conformations with the C atoms of the NCN groups hinged by 44.11 (7) and 48.50 (6)° with respect to the best planes of the other five atoms. Intramolecular O—H...N hydrogen bonds may help to consolidate the molecular conformations. The two independent molecules are linked through an N—H...O hydrogen bond. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H...H (52.9%) and H...C/C...H (39.5%) interactions. Hydrogen bonding and van der Waals interactions are the dominant interactions in the crystal packing. Density functional theory (DFT) optimized structures at the B3LYP/ 6–311 G(d,p) level are compared with the experimentally determined molecular structure in the solid state. The HOMO–LUMO behaviour was elucidated to determine the energy gap.

The new copper(II) complex, namely, di-μ-chlorido-bis{chlorido[methyl(pyridin-2-ylmethylidene)amine-κ2N,N']copper(II)}, [Cu2Cl4(C7H8N2)2], (I), with the ligand 2-pyridylmethyl-N-methylimine (L, a product of Schiff base condensation between methylamine and 2-pyridinecarbaldehyde) is built of discrete centrosymmetric dimers. The coordination about the CuII ion can be described as distorted square pyramidal. The base of the pyramid consists of two nitrogen atoms from the bidentate chelate L [Cu—N = 2.0241 (9), 2.0374 (8) Å] and two chlorine atoms [Cu—Cl = 2.2500 (3), 2.2835 (3) Å]. The apical position is occupied by another Cl atom with the apical bond being significantly elongated at 2.6112 (3) Å. The trans angles of the base are 155.16 (3) and 173.79 (2)°. The Cu...Cu separation in the dimer is 3.4346 (3) Å. In the crystal structure, the loosely packed dimers are arranged in stacks propagating along the a axis. The X-band polycrystalline 77 K EPR spectrum of (I) demonstrates a typical axial pattern characteristic of mononuclear CuII complexes. Compound (I) is redox active and shows a cyclic voltammetric response with E1/2 = −0.037 V versus silver–silver chloride electrode (SSCE) assignable to the reduction peak of CuII/CuI in methanol as solvent.

The crystal structure of vanthoffite {hexasodium magnesium tetrakis[sulfate(VI)]}, Na6Mg(SO4)4, was solved in the year 1964 on a synthetic sample [Fischer & Hellner (1964). Acta Cryst. 17, 1613]. Here we report a redetermination of its crystal structure on a mineral sample with improved precision. It was refined in the space group P21/c from a crystal originating from Surtsey, Iceland. The unique Mg (site symmetry overline{1}) and the two S atoms are in usual, only slightly distorted octahedral and tetrahedral coordinations, respectively. The three independent Na atoms are in a distorted octahedral coordination (1×) and distorted 7-coordinations intermediate between a `split octahedron' and a pentagonal bipyramid (2×). [MgO6] coordination polyhedra interchange with one half of the sulfate tetrahedra in <011> chains forming a (100) meshed layer, with dimers formed by edge-sharing [NaO7] polyhedra filling the interchain spaces. The other [NaO7] polyhedra are organized in a parallel layer formed by [010] and [001] chains united through edge sharing and bonds to the remaining half of sulfate groups and to [NaO6] octahedra. The two types of layers interconnect through tight bonding, which explains the lack of morphological characteristics typical of layered structures.

In the first reported crystal structure involving the potential ligand N,N',N''-tris(pyridin-2-yl)benzene-1,3,5-tricarboxamide, C24H18N6O3, intermolecular N—H...O hydrogen bonds link the molecules via their amide groups into slanted ladder-like chains, in which the uprights of the ladder are formed by the hydrogen-bonding interactions and the benzene ring cores of the molecules act as the rungs of the ladder. Only two of the three amide groups in the molecule are involved in hydrogen bonding and this influences the degree of out-of-plane twisting at each amide group, with the twist being more significant for those amide groups participating in hydrogen bonds.

In small-molecule single-crystal structure determination, we now have at our disposal an inspiring range of fantastic diffractometers with better, brighter sources, and faster, more sensitive detectors. Faster and more powerful computers provide integrated tools and software with impressive graphical user interfaces. Yet these tools can lead to the temptation not to check the work thoroughly and one can too easily overlook tell-tale signs that something might be amiss in a structure determination; validation with checkCIF is not always revealing. This article aims to encourage practitioners, young and seasoned, by enhancing their structure-determination toolboxes with a selection tips and tricks on recognizing and handling aspects that one should constantly be aware of. Topics include a pitfall when setting up data collections, the usefulness of reciprocal lattice layer images, processing twinned data, tips for disorder modelling and the use of restraints, ensuring hydrogen atoms are added to a model correctly, validation beyond checkCIF, and the derivation and interpretation of the final results.

An efficient synthesis of 1-aryl­isochromeno[3,4-d][1,2,3]triazol-5(1H)-ones, involving the diazo­tization of 3-amino-4-aryl­amino-1H-isochromen-1-ones in weakly acidic solution, has been developed and the spectroscopic characterization and crystal structures of four examples are reported. The mol­ecules of 1-phenyl­isochromeno[3,4-d][1,2,3]triazol-5(1H)-one, C15H9N3O2, (I), are linked into sheets by a combination of C—H⋯N and C—H⋯O hydrogen bonds, while the structures of 1-(2-methyl­phen­yl)isochromeno[3,4-d][1,2,3]triazol-5(1H)-one, C16H11N3O2, (II), and 1-(3-chloro­phen­yl)isochromeno[3,4-d][1,2,3]triazol-5(1H)-one, C15H8ClN3O2, (III), each contain just one hydrogen bond which links the mol­ecules into simple chains, which are further linked into sheets by π-stacking inter­actions in (II) but not in (III). In the structure of 1-(4-chloro­phen­yl)isochromeno[3,4-d][1,2,3]triazol-5(1H)-one, (IV), isomeric with (III), a combination of C—H⋯O and C—H⋯π(arene) hydrogen bonds links the mol­ecules into sheets. When com­pound (II) was exposed to a strong acid in methanol, qu­anti­tative conversion occurred to give the ring-opened transesterification product methyl 2-[4-hy­droxy-1-(2-methyl­phen­yl)-1H-1,2,3-triazol-5-yl]benzoate, C17H15N3O3, (V), where the mol­ecules are linked by paired O—H⋯O hydrogen bonds to form centrosymmetric dimers.

The com­pound poly[2-hy­droxy-N-methyl­ethan-1-aminium [μ3-cyanido-κ3C:C:N-di-μ-cyanido-κ4C:N-dicuprate(I)]], {(C3H10NO)[Cu2(CN)3]}n or [meoenH]Cu2(CN)3, crystallizes in the tetra­gonal space group P43. The structure consists of a three-dimensional (3D) anionic CuICN network with noncoordinated protonated N-methyl­ethano­lamine cations providing charge neutrality. Pairs of cuprophilic Cu atoms are bridged by the C atoms of μ3-cyanide ligands, which link these units into a 43 spiral along the c axis. The spirals are linked together into a 3D anionic network by the two other cyanide groups. The cationic moieties are linked into their own 43 spiral via N—H⋯O and O—H⋯O hydrogen bonds, and the cations inter­act with the 3D network via an unusual pair of N—H⋯N hydrogen bonds to one of the μ2-cyanide groups. Thermogravimetric analysis indicates an initial loss of the base cation and one cyanide as HCN at temperatures in the range 130–250 °C to form CuCN. We show how loss of a specific cyanide group from the 3D CuCN structure could form the linear CuCN structure. Further heating leaves a residue of elemental copper, isolated as the oxide.

Crystals of the rare earth metal polytelluride LaTe1.82(1), namely, lanthanum telluride (1/1.8), have been grown by molten alkali halide flux reactions and vapour-assisted crystallization with iodine. The two-dimensionally incommensurately modulated crystal structure has been investigated by X-ray diffraction experiments. In contrast to the tetra­gonal average structure with unit-cell dimensions of a = 4.4996 (5) and c = 9.179 (1) Å at 296 (1) K, which was solved and refined in the space group P4/nmm (No. 129), the satellite reflections are not compatible with a tetra­gonal symmetry but enforce a symmetry reduction. Possible space groups have been derived by group–subgroup relationships and by consideration of previous reports on similar rare earth metal polychalcogenide structures. Two structural models in the ortho­rhom­bic superspace group, i.e. Pmmn(α,β,1 over 2)000(−α,β,1 over 2)000 (No. 59.2.51.39) and Pm21n(α,β,1 over 2)000(−α,β,1 over 2)000 (No. 31.2.51.35), with modulation wave vectors q1 = αa* + βb* + 1 over 2c* and q2 = −αa* + βb* + 1 over 2c* [α = 0.272 (1) and β = 0.314 (1)], have been established and evaluated against each other. The modulation describes the distribution of defects in the planar [Te] layer, coupled to a displacive modulation due to the formation of different Te anions. The bonding situation in the planar [Te] layer and the different Te anion species have been investigated by density functional theory (DFT) methods and an electron localizability indicator (ELI-D)-based bonding analysis on three different approximants. The temperature-dependent electrical resistance revealed a semiconducting behaviour with an estimated band gap of 0.17 eV.

During evaporation of natural and synthetic K–Mg–Cl brines, the formation of almost square plate-like crystals of potassium carnallite (potassium chloride magnesium dichloride hexa­hydrate) was observed. A single-crystal structure analysis revealed a monoclinic cell [a = 9.251 (2), b = 9.516 (2), c = 13.217 (4) Å, β = 90.06 (2)° and space group C2/c]. The structure is isomorphous with other carnallite-type com­pounds, such as NH4Cl·MgCl2·6H2O. Until now, natural and synthetic carnallite, KCl·MgCl2·6H2O, was only known in its ortho­rhom­bic form [a = 16.0780 (3), b = 22.3850 (5), c = 9.5422 (2) Å and space group Pnna].

The covers to the last issues of the current runs of "Avengers" and "New Avengers," leading into "Secret Wars."; Credit: Marvel

Marvel Comics held a press conference this week announcing details about "Secret Wars," a company-wide comic book crossover that they promise will change everything.

Promises of change in comics often don't amount to much, but here's why this one just might, with Marvel teasing that it will produce a whole new world for its characters.

"We see this as putting an endcap to decades of stories and starting a new era," said Marvel Editor-in-Chief Axel Alonso. "And when you see the scope of the event, you see what we're doing, what we're willing to do, this is a place where we're going to be bringing new pieces onto the board and taking old pieces off. You guys will be yelling and screaming, you'll be loving, hating, and in equal measure."

Reboot history

Rival DC Comics has always been quick to have stories designed to streamline their history, with the "Crisis on Infinite Earths" being the most famous one — a story that destroyed the DC Comics universe of the time, birthing a new timeline that gave us the versions of DC's heroes we know today. Several minor and major reboots followed, with the biggest since then being 2011's New 52 (and a tease of another one with this April's "Convergence").

Meanwhile, Marvel still refers back to stories from their early days, beginning with the first issue of "Marvel Comics" in 1939, and more so since the launch of "Fantastic Four" and the interlinked Marvel Universe in the 1960s, led by Stan Lee and Jack Kirby.

Marvel previously launched a line of comics meant to offer a fresh vision of the Marvel characters called Ultimate Comics, but now the worlds of those characters and the traditional Marvel universe are getting combined thanks to "Secret Wars."

"The Ultimate Universe, the Marvel Universe, they're going to smash together," said Alonso. "This is the Marvel Universe moving forward."

"We've never done anything like this, ever," said Marvel senior vice president and executive editor Tom Brevoort. "And what we're going to do to top it, I don't know. Hopefully that will be somebody else's problem."

The stories leading to "Secret Wars," and what is Battleworld?

The story that's been built up so far has to do with different universes colliding into each other — and in the first issue of "Secret Wars," the Marvel and Ultimate Earths collide, with the heroes of those worlds unable to stop it. What's left behind is what Marvel is calling "Battleworld," a patchwork planet with different parts of it inhabited by the characters from different famous Marvel crossovers of the past (you can see some of those past titles in the slideshow above).

Marvel released this video to help you visualize what exactly Battleworld is:

Battleworld video

See a map of Battleworld here, showing the different worlds made up of old storylines to be explored in "Secret Wars" (and click to enlarge):

Brevoort described Battleworld as "The little melting pot in which the new Marvel Universe will be created" after the Marvel and Ultimate versions of Earth are destroyed. He said that Battleworld is what Marvel is going to be "during, through and after" the beginning of "Secret Wars."

"Once you hit 'Secret Wars' 1, there is no Marvel Universe. There is no Ultimate Universe. All there is is Battleworld, and a whole lot of empty void," Brevoort said.

"Every single piece of this world is a building block for the Marvel Universe moving forward," Alonso said. "None of these stories are Elseworlds, or What Ifs, or alternative reality stories. They aren't set in the past or the future. They're not set in an alternate reality. They're set in the reality of the Marvel Universe."

It's also a story that uses an old name — the original "Secret Wars" involved an alien taking heroes from Earth and forcing them into battle for the fate of the universe. It remains unclear if the villain from that crossover will play a role here.

Why is Marvel rebooting?

Observers were quick to speculate on some of the behind-the-scenes reasons for the change. Combining the Ultimate Universe with the traditional Marvel Universe would let them incorporate the half-black, half-Latino Spider-Man from the Ultimate line that grabbed headlines a few years ago. It would let them do something different with characters like the X-Men and the Fantastic Four, who have been a flashpoint for controversy due to Fox retaining rights in perpetuity to any films based on those characters.

It also opens the door to a longtime comic book trope: Bringing back to life the dead.

"If we were to want to resurrect Gwen Stacy, this would be the place to do it, wouldn't it?" Alonso said.

What do creators and fans think about "Secret Wars"?

Speaking of the death of Gwen Stacy, the writer who pulled the trigger on killing her, Gerry Conway, tells Newsarama that he's on board.

"I think like with any idea, the execution will matter more than the idea itself. The idea of a reset is, by itself, not a bad idea," Conway said.

One who's less on board with it: longtime Spider-Man artist John Romita.

"My guess is new fans will be okay with it, and old fans will grumble," Romita told Newsarama. "I’m not a businessman, but I do know that comic companies, for almost 100 years now, do whatever they can for shock value. They grab attention. Personally, I hate all the goofy things they do. When I was there, I used to fight stuff like this. But you can’t stop them."

Current Marvel writers have been sworn to secrecy about what happens once "Secret Wars" is done:

Dan Slott tweet

The lack of certainty about what this all means has led fans to wildly speculate, as well as poke fun at what might happen:

Fan tweet 1

Fan tweet 2

It's a story that's been years in the making.

"Every single time we've done an event, we've always had to be mindful of 'Secret Wars,' and we've had to make decisions based on the fact that we knew that 'Secret Wars' was headed our way," Alonso said.

Brevoort said that Hickman proposed a version of "Secret Wars" years ago, but that vision has since become significantly larger.

"It sounds like typical Stan lee hyperbole — and there's nothing wrong with typical Stan Lee hyperbole — but it is difficult to imagine something that would be larger in scope, in scale, than what we are doing with 'Secret Wars,'" Brevoort said.

That father of the modern Marvel comics world, Stan Lee, tells Newsarama that the reboot is "probably good."

"Anything they do that’s unexpected and different usually captures the attention of the fans," Lee said. "It sounds intriguing to me."

Lee also tells Newsarama that if he were to do it all again, he'd do it basically the same, describing what he did as "the right way to go, and maybe sometimes, even the perfect way to go."

"I liked making the Fantastic Four superheroes without a secret identity. I liked the tragedy of Spider-Man’s origin, the ‘with great power, there must also come great responsibility.’ I thought it was the right way of doing things at the time. And I still like what I’ve done," Lee said. "I can’t think, off the top of my head, of anything I’d really want to change."

What does "Secret Wars" mean for fans?

More details are promised in the weeks to come, with a free preview issue being released on Free Comic Book Day, May 2. While fans wait, they may want to heed the wait-and-see approach advocated by Conway and famed "Thor" artist Walt Simonson.

"Maybe this is coming back out of my old geology days, but I try not to have instant reactions to things and say, ‘Oh my God! That’s terrible!’" Simonson told Newsarama. "My basic reaction is usually ‘let’s see the evidence in the field.’ Let’s come back in a year and see what we’ve got. That will tell the story.”

And for those who say that Marvel is ruining their childhood by messing with the history of their favorite characters, Conway tells Newsarama:

"I would say to them, no, your childhood is still your childhood. There’s a point to be made, and it’s a universal one: We have to see that there’s a difference between what people do today, and what they did yesterday. Yesterday still exists, those stories still exist. Now someone else is getting a chance at a new childhood. And that’s nice."

Watch the full "Secret Wars" live press conference below:

Secret Wars press conference video

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

A cosplay gathering in the Anaheim Convention Center's Grand Plaza during WonderCon Anaheim 2014.; Credit: Kevin Green/SDCC

For all the sad comic book and pop culture fans who weren't able to get tickets to San Diego Comic-Con, we've got good news for you: They run another convention, and it's closer to Los Angeles. Their little brother WonderCon Anaheim has been growing, with some comparing it to the Comic-Con of old — before it got way too crowded. It's this Friday through Sunday, April 3-5. They're starting to have big stars and lots of great panels, so if you want to get your geek heart sated, here are some of the events you won't want to miss.

Warner Bros. Presentation: San Andreas, Mad Max: Fury Road

San Andreas trailer

The most highly anticipated event at this weekend's convention, Warner Brothers is putting on a special presentation with footage from these two upcoming action films. They haven't announced which stars will be on hand, but these panels often surprise with star power, so you may get a visit from stars like "San Andreas's" Dwayne "The Rock" Johnson or "Mad Max: Fury Road's" Tom Hardy or Charlize Theron. At the Comic-Con panel last year for the "Mad Max" flick, the director talked in detail about the film, so you'll probably at least get his take on the franchise and its resurrection.

DC Comics TV shows: The Flash, Gotham, iZombie

The Flash trailer

While Marvel has been dominant on the big screen, DC has put out a diverse slate of TV shows, with "The Flash" being the biggest hit among them. It's among those getting a spotlight at WonderCon, with creators and stars dishing on the programs that have captured the imaginations of TV fans and comic fans alike. All three shows are also getting special video presentations, likely showing clips of what you can expect the rest of this season. And in case you didn't already know, "iZombie" comes from "Veronica Mars" creator Rob Thomas, so come find out about his latest project.

World Premiere: Batman vs. Robin

Batman vs. Robin trailer

It's become a tradition at both WonderCon and San Diego Comic-Con for DC Comics to debut their latest animated movie, and the new one is based on the critically acclaimed "Court of Owls" storyline by writer Scott Snyder. (Be sure to check out our previous interviews with Snyder — he's even an NPR fan.) The original story is based on how Batman thinks he knows everything there is to know about Gotham City and faces the discovery that there are deep secrets about the city that he had no idea about, and the film also emphasizes him fighting his son Damian.

Sing-alongs: Dr. Horrible & Batman's The Music Meister

Batman: The Brave and the Bold: Drives Us Bats

People go to comic conventions to geek out, and what's geekier than a good old-fashioned singalong? In addition to one for geek god Joss Whedon's much loved Web series "Dr. Horrible's Sing-Along Blog," they're also doing one for the musical episode of animated series "Batman: The Brave and the Bold" — which, just like "Dr. Horrible," features singing by the one and only Neil Patrick Harris. In the Batman cartoon, he plays the Music Meister, a Batman villain who makes both heroes and villains sing, as he drops some tunes of his own.

Superman: The Richard Donner Years Celebrity Super Reunion

Superman: The flying sequence

There's a reunion of stars from the first two of the classic Christopher Reeve Superman movies, including Lois Lane herself, Margot Kidder. You can also see the actors who played characters like Jimmy Olsen, several of the villains and more, as well as two of the producers. Find out what you don't know about the movie that broke ground when it came to depicting flight on-screen and, like the ads promised, made you believe a man could fly.

TV writing panels

Two panels will give you a peek into the world of the writers who write some of the hottest shows on TV: "TV Guide Magazine's Fan Favorites Showrunners" and "Inside The Writers' Room: Earth's Mightiest Writers Re-Assemble Redux." The first of those includes legendary TV showrunners like Dan Harmon of "Community" and the minds behind shows including "Orphan Black," "The Goldbergs" and more. Meanwhile, at the writers room panel, you'll get writers who've worked on shows like "Lost," "Firefly," "Heroes," "The Big Bang Theory," "Agent Carter" and more.

Fan culture programming track

This includes a lot of different panels, but it's a sign of the way fandom is shifting — it's a lifestyle that's far more diverse than it used to be, with a lot more gender parity. This track includes panels on topics like body confidence in cosplay, fashion, fitness, race and more. See what sparks your interest and might invite you into having an identity as a fan being a bigger part of your life while not letting anyone make you feel excluded.

There's so much more, like Will Forte doing a panel promoting his new show "The Last Man On Earth," the annual cosplay masquerade and so much more. Tickets are sold out for Saturday, but at press time, tickets were still available for both Friday and Sunday at WonderCon.

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

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.

Using mineralogical data, it is demonstrated that chemical simplicity measured as an amount of Shannon information per atom on average corresponds to higher symmetry measured as an order of the point group of a mineral, which provides a modern formulation of the Fedorov–Groth law.