Dried specimens of nearly 800 flowering plants were acquired by the Botany Department of the Smithsonian’s National Museum of Natural History from the National Botanical Research Institute in Windhoek, Namibia, Africa. The collection includes nearly 160 specimens from the Compositae, or sunflower family.

The post Namibian specimens come to the herbarium of the National Museum of Natural History appeared first on Smithsonian Insider.

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.

Since its doors first opened in 1910, the National Museum of Natural History has inspired curiosity and learning about the natural world and our place […]

The post Slide Show: Smithsonian’s National Museum of Natural History is 100! appeared first on Smithsonian Insider.

Flowers are usually associated with butterflies, but not the Dutchman’s Pipe (Aristolochia grandiflora). This deciduous vine, native to Brazil, has large flowers that emit an odor of decaying flesh, which attracts flies and beetles.

The post Video: Smithsonian horticulturalist Janet Draper discusses the pollination of the pelican flower 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.

The scientists staked out dozens of the gingers night and day while the plants flowered, but no long-proboscid pollinator ever appeared. Climate change, they surmised, was responsible for the loss of this highly specialized and now, perhaps forever unknown insect.

The post With specialist pollinator absent, Himalayan gingers must adapt appeared first on Smithsonian Insider.

These opportunistic plants quickly fill-in the gap taking advantage of the increased light coming through the tree canopy and the fresh soil at the fallen tree’s turned-up roots.

The post Falling trees help invasive wineberry move into deciduous forests in North America appeared first on Smithsonian Insider.

In 1909, naturalist Dr. Edgar A. Mearns joined Theodore Roosevelt and scientists from the Smithsonian and New York’s American Museum of Natural History on an […]

The post New project will improve access to thousands of scientific field books, journals and notes in Smithsonian collections appeared first on Smithsonian Insider.

Lodgepole pine drawn in 1898 by U.S. National Herbarium illustrator Frederick Andrew Walpole.

The post Frederick Walpole illustrations recovered 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.

Ancient pollen and charcoal preserved in deeply buried sediments in Egypt’s Nile Delta document the region’s ancient droughts and fires, including a huge drought 4,200 years ago associated with the demise of Egypt’s Old Kingdom.

The post Fossil pollen used to augment climate record of Egypt’s Nile Delta 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.

By simulating the environment when corn was first exploited by people and then domesticated, Smithsonian scientists discovered that corn’s ancestor; a wild grass called teosinte, […]

The post Greenhouse “time machine” sheds light on corn domestication appeared first on Smithsonian Insider.

Carnivorous plants are a fascinating example of nature at its best. Living in habitats with nutrient-poor soil, carnivorous plants evolved to attract some insects as […]

The post How Carnivorous Plants avoid eating their pollinating insect friends appeared first on Smithsonian Insider.

On crime scene investigation shows, forensic scientists use remnants of genetic material to solve mysteries in a matter of hours. Researchers at the Smithsonian Environmental […]

The post Environmental “Forensics” Pieces Together Mysterious Plant Invasion appeared first on Smithsonian Insider.

Ubiquitous as they may be today, the origin of the Christmas tree is unknown to most. The tradition of decorating a tree, usually an evergreen […]

The post Agustín Stahl: Scientist Who Introduced the “Arbol de Navidad” (Christmas Tree) to Puerto Rico appeared first on Smithsonian Insider.

Engineers shouldn’t have to reinvent the wheel—or wings, or sonar systems—when mother nature has already done much of the heavy design work. In fact, finding […]

The post Next Engineering Revolution Is Hiding in Museum Collections appeared first on Smithsonian Insider.

In the dark recesses of an underground fungus garden, a Panamanian leaf-cutting ant plucks a tuft of mycelia, the wispy part of the basidiomycete fungus […]

The post Mystery solved? Ants Protect Young From Infection By Cocooning Them in Fungus 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.

Muted moans of sadness punctuated the pandemonium that engulfed the Smithsonian’s National Zoo over the weekend as throngs of well-wishing visitors flooded through the Zoo’s […]

The post Bon Voyage Bao Bao! Washington loses its precious treasure appeared first on Smithsonian Insider.

Zebra mussels in the Great Lakes, lionfish in the Atlantic and pythons in the Everglades: Large creatures like these generally draw the spotlight when talking […]

The post DNA is trusty new weapon for detecting slime nets and other invasive marine parasites appeared first on Smithsonian Insider.

Millions, if not billions, of specimens reside in the world’s natural history collections, but most of these have not been carefully studied, or even looked […]

The post Using digitized Botany specimens, AI excels in simple curatorial tasks 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.

Each year from summer into fall, ornamental crape myrtle trees in the southern and central U.S. lay out a visual feast of vibrant flowers in […]

The post Crape myrtle trees aren’t native to the US, but hungry native birds still find them tasty appeared first on Smithsonian Insider.

The development of antiviral strategies requires a clear understanding of the principles that control the protein arrangements in viral shells. Considered here are those capsids that violate the paradigmatic Caspar and Klug (CK) model, and it is shown that the important structural features of such anomalous shells from the Picobirnaviridae, Flaviviridae and Leviviridae families can be revealed by models in the form of spherical icosahedral packings of equivalent rhombic structural units (SUs). These SUs are composed of protein dimers forming the investigated capsids which, as shown here, are based on the rhombic triacontahedron (RT) geometry. How to modify the original CK approach in order to make it compatible with the considered rhombic tessellations of a sphere is also discussed. Analogies between capsids self-assembled from dimers and trimers are demonstrated. This analysis reveals the principles controlling the localization of receptor proteins (which recognize the host cell) on the capsid surface.

The unit-cell reduction described by Selling and used by Delone (whose early publications were under the spelling Delaunay) is explained in a simple form. The transformations needed to implement the reduction are listed. The simplicity of this reduction contrasts with the complexity of Niggli reduction.

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.

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?

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?