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Smithsonian scientists and colleagues, however, have recently found evidence that gymnosperm plants shared an intricate pollination relationship with scorpionfly insects 62 million years before flowering plants appear in fossil records.

The post Prehistoric pollination: Scorpionfly mouthparts fit tubular channels of gymnosperm cones 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.

Two grass species that had been relatively rare in the plots, Spartina patens and Distichlis spicata, began to respond vigorously to the excess nitrogen. Eventually the grasses became much more abundant. Nitrogen ultimately changed the composition of the ecosystem as well as its capacity to store carbon.

The post Scientists find excess nitrogen favors plants that respond poorly to rising CO2 appeared first on Smithsonian Insider.

New results from a massive study at the Smithsonian Tropical Research Institute show that interactions among community members play an important role in determining which organisms thrive.

The post Tropical tree study shows interactions with neighbors plays an important role in tree survival 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.

Current plans to protect the Chesapeake Bay include planting trees along hundreds of miles of streams that empty into the Bay. This study provides realistic limits for how much these buffers might further reduce nitrate pollution, and it helps identify where buffer restoration can offer the greatest additional nitrate removal.

The post Study backs restoring green buffers along streams to reduce Chesapeake Bay pollution appeared first on Smithsonian Insider.

For the first time researchers from the Smithsonian, South Dakota State University and the University of Nebraska described the immature stages of the switchgrass moth, first collected in Denver in 1910.

The post Potential biofuel pest, the switchgrass moth, under renewed scrutiny of entomologists 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.

Smithsonian plant physiologist Bert Drake has studied one wetland's response to climate change for more than two decades. He gives a tour of the field experiment and explains some of the findings.

The post On the Chesapeake Bay, Smithsonian plant physiologist Bert Drake has been studying one wetland’s response to climate change for more than two decades. appeared first on Smithsonian Insider.

The small-whorled pogonia is a plain, endangered orchid that inhabits the hollows of Virginia, and survives only in collaboration with a particular type of fungus […]

The post The small whorled pogonia 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.

Fulcaldea stuessyi is a newly discovered member of the Barnadesioideae, a subfamily of the Compositae, or sunflower family of flowering plants. It was found in northeastern […]

The post Fulcaldea stuessyi is newly discovered member of the Barnadesioideae, a subfamily of the Compositae, or sunflower family of flowering plants, appeared first on Smithsonian Insider.

Studies at two remote Smithsonian Institution Global Earth Observatory sites in Panama and Thailand show the first evidence of long-term effects of nitrogen pollution in tropical trees.

The post Air pollution is fertilizing tropical forests 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.

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.

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.

Small-Whorled Pogonia: Endangered Orchid on the Edge. The small-whorled pogonia (Isotria medeoloides) is endangered 16 of the 20 states where it still appears, earning it the title "rarest orchid east of the Mississippi."

The post Small-Whorled Pogonia: Endangered Orchid on the Edge appeared first on Smithsonian Insider.

They’ve got no roots or veins and grow in hanging pendants or tightly packed mats attached to stones, soil and wood. Called by some “the […]

The post Mosses have strong potential to acclimate to global warming, study indicates appeared first on Smithsonian Insider.

Smooth and shiny, the tough body of the South African beetle Pedinorrhina trivittata, a flower eater, appears to be a non-inviting surface for pollen grains […]

The post Caught on camera: Despite hard shells pollen sticks to South African beetles appeared first on Smithsonian Insider.

As mangrove trees lose ground to deforestation and urban sprawl, one development seems to be giving them a boost: climate change. Fewer winter cold snaps […]

The post Mangroves creep north in response to warmer temperatures appeared first on Smithsonian Insider.

Mexico is the fourth largest honey producer and fifth largest honey exporter in the world. A Smithsonian researcher and colleagues helped rural farmers in Mexico […]

The post Genetically modified soybean pollen threatens Mexican honey sales appeared first on Smithsonian Insider.

Do you enjoy Tequila? Then you need to raise your glass to the pollinating bats that helped to make it! Here at Smithsonian Science we […]

The post Love tequila? A toast to pollinating bats! appeared first on Smithsonian Insider.

Ahhh, the sensations of summer…ocean sand between your toes, a cool drink in the shade, and red itchy welts courtesy of that three-leaved miscreant: poison […]

The post A poison ivy primer 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.

Orchids are beautiful, but their beauty can be deceiving. Most orchids don’t have any nectar, yet they cheat their pollinators into thinking that they do […]

The post The Secret Life of Orchids – Part II: Pollinators 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.

This year’s El Niño event is one of the strongest on record and is still ramping up. Large parts of the tropics are turning into […]

The post Major El Nino Perfect opportunity for Global Change Research appeared first on Smithsonian Insider.

How much is a wetland worth? It’s a question that has plagued policymakers, scientists and other leaders looking to protect their communities and slow down […]

The post New report enables creation of carbon credits for restored wetlands appeared first on Smithsonian Insider.

Profound ideas don’t need to be complicated. A simple cube made of aluminum tubing, a centerpiece of a new exhibit “Life in One Cubic Foot,” […]

The post From Rochester to Polynesia, a simple cube unveils Earth’s dazzling biological diversity 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.

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.

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.

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.

According to a new study by biologists at the Smithsonian Migratory Bird Center and Virginia Tech the offspring of a certain songbird, the wood thrush, […]

The post Study: Large shady forest plots essential to survival of post-fledgling songbirds during drought appeared first on Smithsonian Insider.

The report of the Executive Committee for 2017 is presented.

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.

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

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