In southeastern Greenland, two rivers of ice named Helheim and Kangerdlugssuaq flow in spurts and starts toward the coast. They are much like any other […]

The post Astrophysical Observatory scientists are monitoring the mysterious movements of glaciers appeared first on Smithsonian Insider.

The Smithsonian’s National Air and Space Museum has opened a new Public Observatory that contains a 16-inch, 3,000-pound Boller and Chivens telescope, on loan from the Smithsonian Astrophysical Observatory. Through this powerful telescope, museum visitors can now observe the sun (with a special filter), the moon and the brighter stars and planets, such as Venus, Jupiter and Saturn, during daylight hours. Funding for the project was provided by the National Science Foundation.

The post The Smithsonian’s National Air and Space Museum opens new Public Observatory on the Mall in Washington, D.C. appeared first on Smithsonian Insider.

Staff had been on a pregnancy watch focused on the 3 1/2-year-old clouded leopard Jao Chu (JOW-chew) for four days. Jao Chu gave birth to the first cub at 6:04 p.m. and the second cub at 6:20 p.m.

The post Clouded leopard cubs born at National Zoo’s Front Royal campus on Valentine’s Day appeared first on Smithsonian Insider.

The research and patience has paid off. The sisters, Nababiep and Shera, have spent short periods of time with the male, Luke, individually and simultaneously. This happened only after they each had spent more than a year sniffing Luke through a mesh door (called a “howdy door”).

The post Patience and research may bring lion cubs to the National Zoo appeared first on Smithsonian Insider.

Darwin's bark spider cast giant webs across streams, rivers and lakes, suspending the web’s orb above water and attaching it to plants on each riverbank. Bridgelines of these water-spanning webs have been measured as long as 25 meters.

The post Newly discovered Madagascar spider spins largest, toughest webs on record appeared first on Smithsonian Insider.

The Smithsonian’s National Zoo recently welcomed two litters of lion cubs over a three-week period – bringing the total number of cubs to seven during the summer of 2010.

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For safety’s sake, the four eight-week-old cubs born to  National Zoo lioness Shera were given a swim test on Oct. 26  in the moat of […]

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Astronomers using NASA's Chandra X-ray Observatory have found evidence of the youngest black hole known to exist in our cosmic neighborhood. The 30-year-old object is a remnant of SN 1979C, a supernova in the galaxy M100 approximately 50 million light years from Earth.

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Sita (SEE-ta), a 2-year-old female clouded leopard at the Smithsonian Conservation Biology Institute in Front Royal, Va., gave birth to these two cubs on Monday, […]

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Five cheetah cubs were born May 28 to 6-year-old Amani at the Smithsonian Conservation Biology Institute in Front Royal, Va. Amani is a dedicated mother according to keepers, who have observed her nursing and grooming the cubs.

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Using the deepest X-ray image ever taken, astronomers found the first direct evidence that massive black holes were common in the early universe. This discovery from NASA's Chandra X-ray Observatory shows that very young black holes grew more aggressively than previously thought, in tandem with the growth of their host galaxies.

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New research shows that some old stars might be held up by their rapid spins, and when they slow down, they explode as supernovae. Thousands of these "time bombs" could be scattered throughout our Galaxy.

The post Our galaxy might hold thousands of ticking “time bombs” appeared first on Smithsonian Insider.

Astronomers are confident the Cygnus X-1 system contains a black hole, and with these latest studies they have remarkably precise values of its mass, spin, and distance from Earth.

The post New details on birth of black hole Cygnus X-1 revealed by Chandra X-ray Observatory appeared first on Smithsonian Insider.

Both investigations were carried out through DNA analysis of fish tissue performed in a laboratory using a U.S. Food and Drug Administration protocol that originated largely at the Smithsonian’s National Museum of Natural History. DNA from the fish in question was identified by matching it against a database of DNA fish barcodes that again, has its origins at the Smithsonian.

The post Smithsonian research with DNA barcoding is making seafood substitution easier to catch appeared first on Smithsonian Insider.

The fastest wind ever discovered blowing off a disk around a stellar-mass black hole has been observed by a team of astronomers using NASA’s Chandra X-ray Observatory.

The post Chandra X-ray Observatory clocks stellar wind at 20 million mph appeared first on Smithsonian Insider.

A new study provides a possible explanation for the mysterious flares. The suggestion is that there is a cloud around Sgr A* containing hundreds of trillions of asteroids and comets, which have been stripped from their parent stars.

The post X-ray flares observed by Chandra are asteroids being torn to pieces in a black hole appeared first on Smithsonian Insider.

Researchers at the Smithsonian Tropical Research Institute and University of Costa Rica studying why spiders do not stick to their own sticky webs have discovered that a spider's legs are protected by a covering of branching hairs and by a non-stick chemical coating. Their results are published online in the journal, Naturwissenschaften.

The post Fancy footwork and non-stick leg coating helps spiders not stick to their own webs appeared first on Smithsonian Insider.

The crustaceans are much more effective when they fight together than when they fight alone, a process McKeon calls the Multiple Defender Effect. “It is a clear example of synergy, and one that underscores the importance of biodiversity in the ocean.”

The post Preventing home invasions means fighting side-by-side for coral-dwelling crabs and shrimp appeared first on Smithsonian Insider.

One such parasite lurks in Chesapeake Bay: an invasive barnacle that hijacks a mud crab’s reproductive system and impregnates it with parasite larvae—even if the crab is male.

The post Undersea parasite turns male mud crabs female appeared first on Smithsonian Insider.

stronomers have used NASA's Chandra X-ray Observatory to find evidence our Milky Way Galaxy is embedded in an enormous halo of hot gas that extends for hundreds of thousands of light years.

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A new study finds that since 1985, half of Australia's Great Barrier Reef coral has died.

The post Smithsonian marine biologist Nancy Knowlton discusses Great Barrier Reef coral dieoff on PBS NewsHour appeared first on Smithsonian Insider.

The Smithsonian Astrophysical Observatory has been awarded a NASA project to build the Tropospheric Emissions: Monitoring of Pollution (TEMPO) instrument. TEMPO will measure North American air pollution, from Mexico City to the Canadian tar/oil sands, and from the Atlantic to the Pacific, hourly and at high spatial resolution.

The post NASA funds Smithsonian Astrophysical Observatory instrument to track North American air pollution appeared first on Smithsonian Insider.

Two Andean bear cubs born at the National Zoo in the early morning of Dec. 13 to 6-year-old Billie Jean.

The post Two Andean bear cubs born Dec. 13 at National Zoo appeared first on Smithsonian Insider.

This image of a wild giant panda was taken by a trail camera in a remote forest in central China. As few as 1,600 giant […]

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New data from NASA's Chandra X-ray Observatory suggest a highly distorted supernova remnant (shown here) may contain the most recent black hole formed in the Milky Way galaxy.

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Using data from NASA’s Chandra X-ray Observatory, astronomers have discovered an unprecedented bonanza of black holes in the Andromeda Galaxy, one of the nearest galaxies […]

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Emmett Duffy, currently the Gluckman Professor of Marine Science at the College of William & Mary in Virginia, has been appointed director of the Smithsonian’s […]

The post Emmett Duffy named director of Smithsonian’s Tennenbaum Marine Observatories Network appeared first on Smithsonian Insider.

The Smithsonian’s National Air and Space Museum announced that it will receive a $6 million donation from the Thomas W. Haas Foundation to establish an […]

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Hopes are high for Comet ISON, which has the potential to become the most spectacular comet seen in years. ISON is speeding through the inner […]

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Almost 14 billion years ago, the universe we inhabit burst into existence in an extraordinary event that initiated the Big Bang. In the first fleeting […]

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Fifteen years ago, NASA’s Chandra X-ray Observatory was launched into space aboard the Space Shuttle Columbia. Since its deployment on July 23, 1999, Chandra has […]

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New data from NASA’s Chandra X-ray Observatory offer a glimpse into the environment of a star before it exploded earlier this year, and insight into […]

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In theory, crabs of the species Planes major should stay true to their mates for life. Heterosexual pairs of these small crustaceans live on loggerhead […]

The post Faithful crabs engage in risky behavior when opportunity arises appeared first on Smithsonian Insider.

Imagine sitting down at your favorite restaurant when something under the table begins painfully pinching and snipping at your toes. This is basically how T. […]

The post Diversity of resident crabs is key to coral survival appeared first on Smithsonian Insider.

Their flavor is a unique blend of lobster and shrimp say lovers of the savory South American crustaceans called “langostinos.” Simmered with garlic, lime juice, […]

The post Squat lobsters: colorful kings of the ocean floor appeared first on Smithsonian Insider.

Native Americans and America’s early colonists ate many more blue crabs than modern researchers previously thought, according to a team of scientists studying crab remains […]

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Tucked in the shadow of the towering Skylab exhibit at the Smithsonian’s National Air and Space Museum, there’s an inferno raging. Lucky for all of […]

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Surplus mustard gas canisters and unexploded bombs dumped in the Pacific Ocean near Hawaii after WWII, have become, scientists say, a potential reef that is […]

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Smothered in tartar sauce and cheese it’s difficult to know just what species of fish lurks beneath the breaded surface of a fast-food fish sandwich. […]

The post Smithsonian scientist creating DNA database to track Caribbean conch and lobster appeared first on Smithsonian Insider.

The outer membrane of Gram-negative bacteria is highly impermeable to hydrophilic molecules of larger than 600 Da, protecting these bacteria from toxins present in the environment. In order to transport nutrients across this impermeable membrane, Gram-negative bacteria utilize a diverse family of outer-membrane proteins called TonB-dependent transporters. The majority of the members of this family transport iron-containing substrates. However, it is becoming increasingly clear that TonB-dependent transporters target chemically diverse substrates. In this work, the structure and phylogenetic distribution of the TonB-dependent transporter YncD are investigated. It is shown that while YncD is present in some enteropathogens, including Escherichia coli and Salmonella spp., it is also widespread in Gammaproteobacteria and Betaproteobacteria of environmental origin. The structure of YncD was determined, showing that despite a distant evolutionary relationship, it shares structural features with the ferric citrate transporter FecA, including a compact positively charged substrate-binding site. Despite these shared features, it is shown that YncD does not contribute to the growth of E. coli in pure culture under iron-limiting conditions or with ferric citrate as an iron source. Previous studies of transcriptional regulation in E. coli show that YncD is not induced under iron-limiting conditions and is unresponsive to the ferric uptake regulator (Fur). These observations, combined with the data presented here, suggest that YncD is not responsible for the transport of an iron-containing substrate.

The new book Subsistence Economies of Indigenous North American Societies provides a comprehensive and in-depth documentation of how Native American societies met the challenges of […]

The post New book: “The Subsistence Economies of Indigenous North American Societies: A Handbook” appeared first on Smithsonian Insider.

“My recurring theme is the transformation of the ordinary…,” explains National Air and Space Museum photographer Carolyn Russo in reference to her new book, Art […]

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The Crab Nebula is one of the most studied objects in the night sky. First observed by Chinese astronomers in 1054 A.D., and possibly others, this supernova remnant and its neutron star have become favorite targets for amateur and professional astronomers alike. The Chandra X-Ray Observatory is operated for NASA by the Smithsonian Astrophysical Observatory in Cambridge, Mass.

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When animal care staff at the Smithsonian's National Zoo need to know when to breed their pandas or when to expect a cub they turn to the Endocrine (Hormones) Research Lab at the Zoo's Front Royal, Va. facility.

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Keeper Tracey Barnes talks about Billie Jean, an Andean bear, and her two new cubs at the Smithsonian's National Zoo.

The post Keeper Tracey Barnes talks about the National Zoo’s Andean bear, Billie Jean, and her two new cubs appeared first on Smithsonian Insider.

What does it take to care for a pride of lions? Go behind the scenes with Great Cats Curator Craig Saffoe as he works with animal keepers and veterinarians to prepare the National Zoo's frisky lion cubs for their public debut. For more about the Zoo's growing pride and to watch them on live webcams: http://nationalzoo.si.edu/Animals/GreatCats/default.cfm?cam=LC4

The post Great Cats curator Craig Saffoe discusses his work caring for the National Zoo’s seven frisky lion cubs appeared first on Smithsonian Insider.

The post Many years of research are celebrated in the December 2010 birth of two cheetah cubs at the Smithsonian Conservation Biology Institute appeared first on Smithsonian Insider.

The post Roland Kays, curator of mammals at the New York State Museum, discusses a new Smithsonian Website for sharing camera-trap images of wild animals appeared first on Smithsonian Insider.