Science & TechnologyS

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Scientists Propose Creation Of New Type Of Seed Bank

While an international seed bank in a Norwegian island has been gathering news about its agricultural collection, a group of U.S. scientists has just published an article outlining a different kind of seed bank, one that proposes the gathering of wild species - - at intervals in the future - - effectively capturing evolution in action.
Scientist Susan Mazer
© UCSBScientist Susan Mazer in a UCSB greenhouse.

In the October issue of Bioscience, Steven J. Franks of Fordham University, Susan J. Mazer of the University of California, Santa Barbara, and a group of colleagues, have proposed a method of collecting and storing seeds of natural plant populations. They argue for the collection of many species in a way that evolutionary responses to future changes in climate can be detected. They call it the "Resurrection Initiative."

"In contrast to existing seed banks, which exist primarily for conservation, this collection would be for research that would allow a greater understanding of evolution," said Franks.

"This seed collection would form an important resource that can be used for many types of research, just as GenBank - - the collection of genetic sequences and information - - forms a key resource for research in genetics and genomics," said Franks.

"Typically, seed banks are focused on the preservation of agricultural species or other plant species of strong economic interest, say, forest species, forest trees," said Mazer. This is to make sure that scientists can maintain a genetically diverse seed pool in the event of some kind of ecological calamity that requires the replenishing of seeds from a certain part of the world or from certain species. "But that implies a relatively static view of a seed bank, a snapshot forever of what a species provides."

Sherlock

Finding Hidden Tomb Of Genghis Khan Using Non-Invasive Technologies

According to legend, Genghis Khan lies buried somewhere beneath the dusty steppe of Northeastern Mongolia, entombed in a spot so secretive that anyone who made the mistake of encountering his funeral procession was executed on the spot.

Once he was below ground, his men brought in horses to trample evidence of his grave, and just to be absolutely sure he would never be found, they diverted a river to flow over their leader's final resting place.
Genghis Khan
© UC San DiegoA 14th-century portrait of Genghis Khan. The painting is now located in the National Palace Museum in Taipei, Taiwan.

What Khan and his followers couldn't have envisioned was that nearly 800 years after his death, scientists at UC San Diego's Center for Interdisciplinary Science in Art, Architecture and Archaeology (CISA3) would be able to locate his tomb using advanced visualization technologies whose origins can be traced back to the time of the Mongolian emperor himself.

Telescope

Colossal Black Holes Common In Early Universe, Spectacular Galactic Collision Suggests

Astronomers think that many - perhaps all - galaxies in the universe contain massive black holes at their centers. New observations with the Submillimeter Array now suggest that such colossal black holes were common even 12 billion years ago, when the universe was only 1.7 billion years old and galaxies were just beginning to form.
4C60.07 system of colliding galaxies
© David A. Hardy/UK ATCArtistโ€™s conception of the 4C60.07 system of colliding galaxies. The galaxy on the left has turned most of its gas into stars, and the black hole in its center is ejecting charged particles in the two immense jets shown. The galaxy on the right also has a black hole causing the galaxyโ€™s central region to shine, but much of its light is hidden by surrounding gas and dust. Vast numbers of stars are forming out of the gas and dust, and some of the material is being pulled away from the galaxy.

The new conclusion comes from the discovery of two distant galaxies, both with black holes at their heart, which are involved in a spectacular collision.

4C60.07, the first of the galaxies to be discovered, came to astronomers' attention because of its bright radio emission. This radio signal is one telltale sign of a quasar - a rapidly spinning black hole that is feeding on its home galaxy.

When 4C60.07 was first studied, astronomers thought that hydrogen gas surrounding the black hole was undergoing a burst of star formation, forming stars at a remarkable rate - the equivalent of 5,000 suns every year. This vigorous activity was revealed by the infrared glow from smoky debris left over when the largest stars rapidly died.

Telescope

First Gamma-ray-only Pulsar Observation Opens New Window On Stellar Evolution

About three times a second, a 10,000-year-old stellar corpse sweeps a beam of gamma-rays toward Earth. This object, known as a pulsar, is the first one known to "blink" only in gamma rays, and was discovered by the Large Area Telescope (LAT) onboard NASA's Fermi Gamma-ray Space Telescope, a collaboration with the U.S. Department of Energy (DOE) and international partners.
the first pulsar that beams only in gamma rays
© NASA/S. Pineault, DRAONASA's Fermi Gamma-ray Space Telescope discovered the first pulsar that beams only in gamma rays. The pulsar (illustrated, inset) lies in the CTA 1 supernova remnant in Cepheus.

"This is the first example of a new class of pulsars that will give us fundamental insights into how stars work," says Stanford University's Peter Michelson, principal investigator for the LAT. The LAT data is processed by the DOE's Stanford Linear Accelerator Center and analyzed by the International LAT Collaboration.

Network

A survey shows that old Internet addresses are not running out yet

Internet address map
© University of Southern California's Information Sciences InstituteInternet address map: About a quarter of the address space is still unassigned (blue), a quarter appears to be relatively densely populated (green), and nearly half of the space has few servers or did not respond to queries (red).
In a little more than two years, the last Internet addresses will be assigned by the international group tasked with managing the 4.3 billion numbers. And yet, while most Internet engineers are looking to Internet Protocol version 6 (IPv6), the next-generation Internet addressing scheme, a research team has probed the entire Internet and found that the problem may not be as bad as many fear. The probe reveals millions of Internet addresses that have been allocated but remain unused.

In a paper to be presented later this month at the Proceedings of the ACM Internet Measurement Conference, a team of six researchers have documented what they claim is the first complete census of the Internet in more than two decades. They discovered a surprising number of unused addresses and conclude that plenty will still be lying idle when the last numbers are handed out in a few years' time. The problem, they say, is that some companies and institutions are using just a small fraction of the many million addresses they have been allocated.

Meteor

Italian astronomer finds new comet

ROME -- An Italian astronomer said he has discovered a new comet --the fifth one he has found in less than a year.

Andrea Boattini, who is currently working at Mount Lemmon Infrared Observatory in Arizona, said he spotted the comet while scanning near-Earth objects, the Italian news service ANSA reported Wednesday.

The comet, technically named P/2008 T1, will also be known as Boattini T1. The astronomer said it was easy to spot because of its unusual blaze and fan-like tail.

Fish

Fossil Fish Shows Complexity of Transition to Land

Fossil Fish
© Ted Daeschler, Academy of Natural SciencesThe head skeleton of Tiktaalik.
In a new study of a fossil fish that lived 375 million years ago, scientists are finding striking evidence of the intermediate steps by which some marine vertebrates evolved into animals that walked on land.

There was much more to the complex transition than fins morphing into sturdy limbs. The head and braincase were changing, a mobile neck was emerging and a bone associated with underwater feeding and gill respiration was diminishing in size - a beginning of the bone's adaptation for an eventual role in hearing for land animals.

The anatomy of this early transformation in life from water to land had never been observed with such clarity, paleontologists and biologists said in announcing the research on Wednesday.

Butterfly

World's Oldest Fossil Impression Of Flying Insect Discovered: Found In Suburban Strip Mall

Image
© Jodi Hilton, Tufts UniversityTufts geology major Richard J. Knecht holding halves of the fossil.
While paleontologists may scour remote, exotic places in search of prehistoric specimens, Tufts researchers have found what they believe to be the world's oldest whole-body fossil impression of a flying insect in a wooded field behind a strip mall in North Attleboro, Mass.

During a recent exploration as part of his senior project, Richard J. Knecht, a Tufts geology major, and Jake Benner, a paleontologist and senior lecturer in the Geology Department, set out to hunt for fossils at a location they learned of while reading a master's thesis that had been written in 1929. With chisels and hammers, the team reached the shale and sandstone outcropping described in the paper. There they delicately picked away pieces of rock before reaching a section that yielded fossils. Just below the surface, they uncovered a fossilized impression of a flying insect.

Sun

Sunspots an omen of weather woes?

More data needed before making such a 'leap,' says astronomer

The lack of sunspots this year has some scientists wondering if this could be an indicator that much colder weather is on the way.

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Response To Immune Protein Determines Pathology Of Multiple Sclerosis

New research may help reveal why different parts of the brain can come under attack in patients with multiple sclerosis (MS). According to a new study in mice with an MS-like disease, the brain's response to a protein produced by invading T cells dictates whether it's the spinal cord or cerebellum that comes under fire.