A Science News Aggregator That Covers Stories in the World Of Science And Technology.
Saturday, November 7, 2009
How Much Would You Pay To See Your Future?
(Credit: Elizabeth Armstrong Moore/CNET)
From CNET:
My dad used to say technology is advancing so quickly that, by the time a product reaches market, it is already obsolete. Moreover, if you wait just a little longer, you can pay a lot less. The sequencing of the human genome takes the advancement of technology, and its fast reduction in cost, to an entirely new level.
Read more ....
How Astronomers Fill In Uncharted Areas Of The Universe
From The Christian Science Monitor:
Thanks to new tools, scientists are quickly mapping the stars.
Astronomers are filling in the blank spaces on their 3-D map of our universe thanks to their ability to sense almost every conceivable form of electromagnetic radiation. Those blanks include remote regions of space and time when the first stars formed and when young galaxies began to group themselves into gravitationally bound clusters.
Read more ....
Aluminum Fuel Could Power Future Space Trips
From Discovery News:
Aluminum and water is usually a boring combination, but light a mixture of nanoaluminum and ice and the results are explosive.
Scientists from Purdue University have created a new, environmentally friendly solid rocket fuel that recently sent a rocket screaming 1300 feet into the air using seven inches of nanoaluminum and ice. The new fuel could power missions to the moon or Mars while dramatically reducing the amount of on-board fuel.
"Theoretically you can get very high temperatures using aluminum and water, but the kinetics would be so slow and it would be so hard to ignite that it's very hard to actually make the rocket work," said Steven Son, a professor at Purdue University in Indiana who helped develop the new fuel.
Read more ....
Beyond North and South: Evidence For Magnetic Monopoles
From Scientific American:
A sighting, of sorts, of separate north-south magnetic poles.
Magnets are remarkable exemplars of fairness—every north pole is invariably accompanied by a counterbalancing south pole. Split a magnet in two, and the result is a pair of magnets, each with its own north and south. For decades researchers have sought the exception—namely, the monopole, magnetism’s answer to the electron, which carries electric charge. It would be a free-floating carrier of either magnetic north or magnetic south—a yin unbound from its yang.
Read more ....
Comic Books Are Good For Children's Learning
Parents should not "look down" on comics as they are just as good for children as reading books, a new study claims.
Researchers believe they can benefit from tales about the caped crusader, Superman and even Dennis the Menace in the same way they can from reading other types of literature, despite teachers and parents often being snooty about comics, experts say.
According to the research, critics say that reading comics is actually a "simplified version" of reading that doesn't have the complexity of "real" books with their "dense columns of words and lack of pictures".
Read more ....
Which One To Choose? Apple's Store Tops 100,000 Applications
From The Daily Mail:
Apple revealed today that developers have crammed the virtual shelves of their App Store with more than 100,000 programmes for iPhones and iPod Touch devices.
Applications can range from time-wasting games, to maps that interact with real-time videos which create an augmented reality.
Even celebrities are getting in on the app action. Noel Edmonds has created a Cosmic Ordering programme to maker user's dreams come true while David Hasselhoff has launched 'Ask the Hoff' to answer your tricky questions.
Read more ....
Early Origins For Uncanny Valley
From The BBC:
Human suspicion of realistic robots and avatars may have earlier origins than previously thought.
The phenomenon, called the uncanny valley, describes the disquiet caused by synthetic people which almost, but not quite, match human expressiveness.
Experiments with macaque monkeys show they too are suspicious of replicas that fall short of the real thing.
The research suggests a deep-seated evolutionary origin for the reactions such artificial entities evoke.
Read more ....
Friday, November 6, 2009
Archaeologists Track Infamous Conquistador Through Southeast
From Science Daily:
Science Daily (Nov. 5, 2009) — Archaeologists at Atlanta's Fernbank Museum of Natural History have discovered unprecedented evidence that helps map Hernando de Soto's journey through the Southeast in 1540. No evidence of De Soto's path between Tallahassee and North Carolina has been found until now, and few sites have been located anywhere.
Read more ....
The Truth About 2012 Doomsday Hype
From Live Science:
2012 is coming very soon. The movie, that is — the disaster film directed by Roland Emmerich depicting global catastrophe of Biblical proportions. The year itself is of course a few dozen months away, and there is growing interest, excitement, and concern for both events.
The film "2012," which opens Nov. 13, takes place, rather obviously, in the year 2012, though it could have been set in 1995 or 2013. The movie's disasters have no particular link to that year, it's just when the Earth happens to start burping earthquakes and farting fire. 2012 made a perfect promotional hook for the film, because the ancient Mayans predicted that the world would end that year, if not specifically on December 21, 2012.
Remembering A Former Caltech Rocket Scientist And The Founder Of China's Space Program
From Popular Science:
Qian Xuesen has died at 98; he helped found Caltech's Jet Propulsion Laboratory before being deported as a suspected Communist.
One can only imagine how history might have played out if the United States had not deported a Chinese-born Caltech rocket scientist on suspicion of being a Communist in 1955. Qian Xuesen first fought his deportation, but later accepted his fate and went on to become the founder of China's missile and space programs. His death this past Sunday comes as China broadens its space exploration efforts to become a potential challenger to a troubled U.S. space program, or perhaps a partner.
Read more ....
Can We Really Control The Weather?
From The Independent:
Recently both Russia and China have claimed to be able to use cloud seeding to increase rainfall and snowfall, or change the location of where it falls. In the past, snow-making experiments have been carried out in North American ski resorts in the past with little evidence of success. So how have the Russian and Chinese scientists achieved this feat and what evidence is there that it is in fact due to cloud seeding?
Read more ....
Nanoparticles Could Damage DNA At A Distance, Study Suggests
Photograph: Getty Images
From The Guardian:
Lab tests show that metal nanoparticles can affect DNA without actually coming into contact with it – though the results are difficult to extrapolate to the human body.
Nanoparticles of metal can damage the DNA inside cells even if there is no direct contact between them, scientists have found. The discovery provides an insight into how the particles might exert their influence inside the body and points to possible new ways to deliver medical treatments.
Read more ....
Tweak Gravity: What If There Is No Dark Matter?
From Scientific American:
Modifications to the theory of gravity could account for observational discrepancies, but not without introducing other complications.
Theorists and observational astronomers are hot on the trail of dark matter, the invisible material thought to account for puzzling mass disparities in large-scale astronomical structures. For instance, galaxies and galactic clusters behave as if they were far more massive than would be expected if they comprised only atoms and molecules, spinning faster than their observable mass would explain. What is more, the very presence of assemblages such as our Milky Way Galaxy speaks to the influence of more mass than we can see. If the mass of the universe were confined to atoms, the clumping of matter that allowed galaxies to take shape would never have transpired.
Read more ....
Carl Sagan Day Celebrated At Florida University
From The Telegraph:
The first Carl Sagan Day is being celebrated at Broward College, Florida, in honour of the great astronomer, novelist and sceptic.
The Pulitzer Prize-winning author, who died in 1996, would have turned 75 on Monday 9 November 2009. Broward College is to hold a day of activities and talks in his memory.
The university, near Davie, Florida, held planetarium shows and star-gazing, as well as a talk by the magician and sceptic James Randi, a friend of Dr Sagan.
Read more ....
A Neutron Star Is Born: Stellar Core Just 12 Miles Across Spotted 11,000 Light Years Away
From The Daily Mail:
An infant neutron star, the super-dense core of a stellar explosion, has been observed for the first time.
The 12.4 mile-wide object is the youngest object of its kind ever discovered, having appeared just 330 years ago.
It has been cloaked in mystery since it was identified as a powerful X-ray source in 1999. Astronomers now know the source is a neutron star 11,000 light years from Earth at the centre of the supernova Cassiopeia A.
Read more ....
Coffee Brims With Health Benefits, Researchers Say
Although caffeine might be considered the "active ingredient" in coffee, coffee is only two percent caffeine and 98 percent "other stuff," including more than 1,000 different compounds such as vitamins, minerals and amino acids. It even contains fiber. Each cup contains the kind that helps prevent cholesterol from being absorbed by the intestines.
Read more ....
F1 Designer Unveils Electric Car
From The BBC:
An electric car created by the McLaren F1 'supercar' road car designer Gordon Murray has been unveiled.
Three prototypes of the T.27 model will be developed over the next 16 months.
The manufacturing process, called iStream, has received £9m of investment, half of which came from the government's Technology Strategy Board.
iStream plants can be just one fifth of the size of a conventional car factory, as the cars are not made from stamped steel.
Read more ....
Are The Alps Growing Or Shrinking?
From Science Daily:
Science Daily (Nov. 6, 2009) — The Alps are growing just as quickly in height as they are shrinking. This paradoxical result comes from a new study by a group of German and Swiss geoscientists.
Due to glaciers and rivers, about exactly the same amount of material is eroded from the slopes of the Alps as is regenerated from the deep Earth's crust. The climatic cycles of the glacial period in Europe over the past 2.5 million years have accelerated this erosion process. In the latest volume of the science magazine Tectonophysics ( No. 474, S.236-249) the scientists show that today's uplifting of the Alps is driven by these strong climatic variations.
Read more ....
A Simple Sneeze Raises Fear of Death
From Live Science:
In the current atmosphere of heightened concern over the H1N1 virus, the everyday sneeze can trigger fears of totally unrelated hazards, including heart attacks, new research suggests.
An everyday achoo reminds people that swine flu is lurking, the researchers found. That intensifies worries about flu. From there, people rely on current feelings to assess unrelated health risks and even policy decisions, the study found.
Read more ....
Giant Crack In Africa Formed In Just Days
(Image: University of Rochester)
From The New Scientist:
A crack in the Earth's crust – which could be the forerunner to a new ocean – ripped open in just days in 2005, a new study suggests. The opening, located in the Afar region of Ethiopia, presents a unique opportunity for geologists to study how mid-ocean ridges form.
The crack is the surface component of a continental riftMovie Camera forming as the Arabian and African plates drift away from one another. It began to open up in September 2005, when a volcano at the northern end of the rift, called Dabbahu, erupted.
Read more ....
TV Switch-Over Triggers Rush To See Rare Stars
From New Scientist:
US SKIES are clearer than usual after the switch in June from analogue to digital TV freed up a chunk of the radio spectrum. Astronomers are now rushing to see what they can find before transmissions from cellphone companies and others fill the space.
Prior to the switch-over, naturally occurring radio waves at frequencies between 700 and 800 megahertz were obscured by analogue TV signals, preventing astronomers from investigating the universe using this band. Now a receiver has been installed at the Arecibo Observatory in Puerto Rico to take advantage of the new-found clarity.
Read more ....
Wearable Artificial Intelligence Could Help Astronauts Troll Mars for Signs of Life
From Popular Science:
Not since RoboCop has being a cyborg seemed so very cool. University of Chicago geoscientists are developing an artificial intelligence system that future Mars explorers could incorporate into their spacesuits to help them recognize signs of life on Mars' barren surface.
Read more ....
Out Of The Blue: Islands Seen From Space
From Wired Science:
Islands are some of the most beautiful, peaceful, violent, desolate and unique places on Earth. While experiencing a tropical island from its sandy beaches, or a volcanic island from its towering peaks is wonderful, experiencing them from above can be inspiring as well.
We’ve collected images taken by astronauts and satellites from space of some of the most interesting islands on the planet.
Read more ....
Methane Maps Step One for Energy Prospectors
From Popular Mechanics:
A team of geologists recently found hundreds of plumes of methane gas—a potent greenhouse gas and potential energy source—in the Arctic Ocean, indicating there may be more methane being released from deep in the ocean than expected. Here is a look at the recent findings and the known sources of methane out today.
An international team of scientists has found hundreds of methane gas plumes in the depths of the Arctic Ocean. German and English researchers used sonar to detect 250 columns of bubbles pushing out of the seabed of West Spitsbergen and then sampled the water in those areas, finding that the gas was predominantly methane. The discovery indicates there may be more of the gas being released and from deeper areas of the Arctic seabed than expected.
Read more ....
PICTURES: "Extraordinary" Ancient Skeletons Found
From National Geographic:
This "extraordinary" skeleton of a woman buried in a seated position was discovered during an archaeological survey before the planned construction of a high-speed train track in central Germany, scientists said in a statement.
The woman, who lived in the early Bronze Age (roughly 2200 to 1600 B.C.), was found near the town of Bad Lauchstadt and is one of several burials found so far during the dig, which runs from September 2008 to June 2010.
Read more ....
Large Hadron Collider Stalled Again... Thanks To Chunk Of Baguette
From Times Online:
The rehabilitation of the beleaguered Large Hadron Collider was on hold tonight after the failure of one of its powerful cooling units caused by an errant chunk of baguette.
The £4 billion particle-collider faced more than a year of delays after a helium leak stymied the project in its first few days of operation. It is gradually being switched back on over the coming months but suffered a new setback on Tuesday morning.
Read more ....
Dead Star Encased in Diamond Shroud
From Discovery News:
Astronomers have just solved a decade-old mystery that explains the unusual behavior of a neutron star -- the dense, hot corpse left behind after a massive stellar explosion -- at the center of the Cassiopeia A supernova remnant.
It wasn't the X-rays streaming from the center of the supernova remnant that astronomers found puzzling. It's why the beams weren't pulsating as expected. Now the scientists know why: The neutron star is covered with a thin atmosphere of carbon, which acts like a giant bulb to smooth light in all directions.
Read more ....
Vast Stars Fed Biggest Black Holes
From Cosmos:
SYDNEY: Stars more than one million times as massive as the Sun may be more stable than astronomers thought, and have created seeds that grew into the largest supermassive black holes.
Supermassive black holes are found at the centre of most galaxies, including our own Milky Way. Theories about their formation range from collapsing clouds of gas to collisions between smaller black holes.
Astrophysicists have also suggested that supermassive black holes could have formed from the catastrophic collapse of incredibly large stars that were one million to one billion times the mass of the Sun.
Read more ....
Thursday, November 5, 2009
Spinal Cord Regeneration Enabled By Stabilizing, Improving Delivery Of Scar-degrading Enzyme
From Science Daily:
Science Daily (Nov. 5, 2009) — Researchers have developed an improved version of an enzyme that degrades the dense scar tissue that forms when the central nervous system is damaged. By digesting the tissue that blocks re-growth of damaged nerves, the improved enzyme -- and new system for delivering it -- could facilitate recovery from serious central nervous system injuries.
Read more ....
The Many Mysteries of Neanderthals
From Live Science:
We are currently the only human species alive, but as recently as maybe 24,000 years ago another one walked the earth — the Neanderthals.
These extinct humans were the closest relatives we had, and tantalizing new hints from researchers suggest that we might have been intimately close indeed. The mystery of whether Neanderthals and us had sex might possibly get solved if the entire Neanderthal genome is reported soon as expected. The matter of why they died and we succeeded, however, remains an open question.
Read more ....
How The Elephant Got Its Trunk (And Other Wonders Of Nature)
From The Independent:
Nobel laureate to reveal secrets of evolution via massive gene-mapping project.
An ambitious plan to map the genomes of 10,000 species of vertebrates – animals with backbones – has been announced by scientists.
Unravelling the DNA sequences of the many species of vertebrates will help science to explain how the leopard got its spots, how the elephant came by its trunk and how the bat learned to fly, the researchers said.
Read more ....
Spraying On Skin Cells To Heal Burns
From Technology Review:
A new technique in burn treatment provides an alternative to skin grafts in the operating room.
Traditionally, treatment for severe second-degree burns consists of adding insult to injury: cutting a swath of skin from another site on the same patient in order to graft it over the burn. The process works, but causes more pain for the burn victim and doubles the area in need of healing. Now a relatively new technology has the potential to heal burns in a way that's much less invasive than skin grafts. With just a small skin biopsy and a ready-made kit, surgeons can create a suspension of the skin's basal cells--the stem cells of the epidermis--and spray the solution directly onto the burn with results comparable to those from skin grafts.
Read more .....
I Can Has Swine Flu? A Cat Comes Down with H1N1
From Time Magazine:
For all the attention that has whirled around H1N1 in recent months, it seems that one vulnerable, and furry, population may have been overlooked: the family pet.
On Wednesday, the Iowa Department of Public Health reported the first confirmed case of H1N1 in a house pet, a 13-year-old domestic shorthaired cat. The animal likely contracted the virus from its owners, veterinarians say, since two of the three family members living in the cat's household had recently suffered from influenza-like illness. Late last week, when the cat came down with flu-like symptoms — malaise, loss of appetite — its owners brought it to Iowa State University College of Veterinary Medicine for treatment. The family mentioned to the vet that they had also recently battled illness, which led to testing the pet for H1N1.
Read more ....
Policy Decisions Slow H1N1 Vaccine Production
From Future Pundit:
Why is H1N1 influenza vaccine coming out so slowly in the United States? Dr. Scott Gottlieb, a former FDA deputy commissioner, says a few policy decisions slow the production of vaccine.
Read more ....Why do adjuvants matter? An adjuvanted H1N1 vaccine being used in Europe contains 3.75 micrograms of vaccine stock. The same vaccine in the U.S., without the adjuvant, requires 15 micrograms of vaccine for equal potency. If we used adjuvants, we could have had four times the number of shots with the same raw material.
A Language of Smiles
From The New York Times:
Say “eeee.” Say it again. Go on: “eeee.”
Maybe I’m easy to please, but doing this a few times makes me giggle. “Eeee.”
Actually, I suspect it’s not just me. Saying “eeee” pulls up the corners of the mouth and makes you start to smile. That’s why we say “cheese” to the camera, not “choose” or “chose.” And, I think, it’s why I don’t get the giggles from “aaaa” or “oooo.”
The mere act of smiling is often enough to lift your mood; conversely, the act of frowning can lower it; scowling can make you feel fed up. In other words, the gestures you make with your face can — at least to some extent — influence your emotional state.
Read more ....
In the Mediterranean, Killer Tsunamis From an Ancient Eruption
From The New York Times:
The massive eruption of the Thera volcano in the Aegean Sea more than 3,000 years ago produced killer waves that raced across hundreds of miles of the Eastern Mediterranean to inundate the area that is now Israel and probably other coastal sites, a team of scientists has found.
The team, writing in the October issue of Geology, said the new evidence suggested that giant tsunamis from the catastrophic eruption hit “coastal sites across the Eastern Mediterranean littoral.” Tsunamis are giant waves that can crash into shore, rearrange the seabed, inundate vast areas of land and carry terrestrial material out to sea.
Read more ....
The New Science of Temptation
From Scientific American:
What happens when Harvard scientists use a brain scanner to look for the devil inside?
The power to resist temptation has been extolled by philosophers, psychologists, teachers, coaches, and mothers. Anyone with advice on how you should live your life has surely spoken to you of its benefits. It is the path to the good life, professional and personal satisfaction, social adjustment and success, performance under pressure, and the best way for any child to avoid a penetrating stare and a cold dinner. Of course, this assumes that our natural urges are a thing to be resisted – that there is a devil inside, luring you to cheat, offend, err, and annoy. New research has begun to question this assumption.
Read more ....
The World’s 18 Strangest Bridges: Gallery
From Popular Mechanics:
Some bridges are engineered with nothing but utility in mind—for these, aesthetic design is secondary to safety and longevity. And given that San Francisco's Bay Bridge was just closed for six days, this makes sense. But advances in design software and construction materials have given bridge architects opportunities to focus on original, striking and sometimes whimsical designs that impress, while keeping function in mind. Here are some of our favorite unusual bridges'and why they're architecturally striking.
Read more ....
Object-Detection Software To Enable Search Within Videos
From Popular Science:
Detection algorithms help computers find humans, or anything else, in YouTube videos or surveillance footage.
Imagine running a Google search for basketball videos, and having your computer sift through actual footage of online videos rather than just the text of the descriptions. A new type of software could enable computers to run searches inside videos, and pick out humans and objects alike.
Read more ....
80 Min Exercise Per Week Prevents Visceral Weight Gain
From Future Pundit:
Fat around your internal organs is thought to be a much bigger risk factor for heart disease than fat near the surface of the skin. Well, if you go on a diet, exercise, get your weight down, and then eventually go off the diet continued exercise will prevent the resulting weight gain from happening where the risk factor is greatest.
BIRMINGHAM, Ala. - A study conducted by exercise physiologists in the University of Alabama at Birmingham (UAB) Department of Human Studies finds that as little as 80 minutes a week of aerobic or resistance training helps not only to prevent weight gain, but also to inhibit a regain of harmful visceral fat one year after weight loss.
Read more ....Speed Limit To The Pace Of Evolution, Biologists Say
From Science Daily:
Science Daily (Nov. 3, 2009) — Researchers at the University of Pennsylvania have developed a theoretical model that informs the understanding of evolution and determines how quickly an organism will evolve using a catalogue of "evolutionary speed limits." The model provides quantitative predictions for the speed of evolution on various "fitness landscapes," the dynamic and varied conditions under which bacteria, viruses and even humans adapt.
Read more ....
Recent Midwest Quakes Called Aftershocks From 1800s
From Live Science:
The small earthquakes that sporadically rattle the central United States may actually be aftershocks from a few extremely large quakes that occurred in the region almost 200 years ago, according to a new study
The New Madrid Earthquakes, which struck between December 1811 and February 1812, are some of the strongest seismic events ever to occur in the contiguous United States in recorded history. The largest quake is estimated to have been 8.0 in magnitude and was powerful enough to temporarily make the Mississippi River flow backwards. The heart of the seismic activity was near the town of New Madrid, Missouri, close to the Kentucky and Tennessee borders.
Read more ....Taste Test: The Biotechnology Of Wine
From The new Scientist:
Wine-making is one of the oldest and most influential forms of biotechnology. People have drunk wine down the millennia for all sorts of reasons: it provides a safer more nutritious alternative to water, a social lubricant, a mind-altering medicinal, a ceremonial drink or even a source of inspiration. Above all else, wine is one of life's great pleasures.
Read more ....
Implantable Silicon-Silk Electronics
From Technology Review:
Biodegradable circuits could enable better neural interfaces and LED tattoos.
By building thin, flexible silicon electronics on silk substrates, researchers have made electronics that almost completely dissolve inside the body. So far the research group has demonstrated arrays of transistors made on thin films of silk. While electronics must usually be encased to protect them from the body, these electronics don't need protection, and the silk means the electronics conform to biological tissue. The silk melts away over time and the thin silicon circuits left behind don't cause irritation because they are just nanometers thick.
Read more ....
Great White Sharks 'Hang Out' Together
Photo: BARCROFT
From The Telegraph:
Great white sharks, previously thought to be solitary hunters scouring the seas for prey, may also have a sociable side.
Researchers have found that the fearsome predators return to the same areas to hold annual meetings, congregating to forage or mate together in their hundreds if not thousands.
One "hotspot", between Hawaii and Mexico, is so popular that the scientists have named it the "white shark cafe".
Read more ....
X-ray Voted Most Important Modern Discovery By Public
From The Daily Mail:
The X-ray has been voted the most important modern discovery by the British public, in a Science Museum poll.
The antibiotic agent penicillin came second followed by the DNA double helix.
Nearly 50,000 visitors voted for the greatest achievements in science, engineering and technology from a shortlist drawn up by museum curators.
The poll, one of the events marking the museum's centenary year, singled out the X-ray machine as the scientific advance with the greatest impact.
Read more ....
Space Hotel 'On Schedule To Open In 2012'
From The Independent:
A company behind plans to open the first hotel in space says it is on target to accept its first paying guests in 2012 despite critics questioning the investment and time frame for the multi-billion dollar project.
The Barcelona-based architects of The Galactic Suite Space Resort say it will cost 3 million euro (£2.6 million) for a three-night stay at the hotel, with this price including an eight-week training course on a tropical island.
Read more ....
India's Space Ambitions Taking Off
From Washington Post:
Nation plans astronaut-training center, manned space mission as it seeks higher profile.
PANNITHITTU, India -- In this seaside village, the children of farmers and fishermen aspire to become something that their impoverished parents never thought possible: astronauts.
Through community-based programs, India's space agency has been partnering with schools in remote areas such as this one, helping to teach students about space exploration and cutting-edge technology. The agency is also training thousands of young scientists and, in 2012, will open the nation's first astronaut-training center in the southern city of Bangalore.
Read more ....
Gene-Makers Put Forward Security Standards
But few companies are willing to sign up yet.
Several gene-synthesis companies yesterday finalized a code of conduct that outlines how to screen orders for synthetic DNA that could be used for terrorist activities.
The code, which has been in the works from the International Association of Synthetic Biology (IASB) in Heidelberg, Germany, for a year and a half, reflects for the most part what has become common practice in gene-synthesis companies. Before filling orders, the firms compare the gene sequences with those from organisms on lists of pathogens, such as the US Centers for Disease Control and Prevention's select-agents list. Most companies then follow up 'hits' with human investigation of whether the match is valid and the purchaser is legitimate.
Read more ....
The Hidden Uses of Everyday Explosives
From Popular Science:
When you stop and look, you may be surprised to find yourself surrounded by all kinds of explosives--some that detonate easier than dynamite.
The explosive C4, a favorite for everything from demolition to terrorism to action movies, is in fact one of the safest explosives. How can an explosive be safe? If it’s hard to set off by accident. C4 is so stable that you can light it with a match (it burns but does not explode) or shoot it (it splatters but does not explode). To go bang, it requires a detonator that produces both heat and shock.
Read more ....
Wednesday, November 4, 2009
Shedding Light On The Cosmic Skeleton
From The Science Daily:
Science Daily (Nov. 4, 2009) — Astronomers have tracked down a gigantic, previously unknown assembly of galaxies located almost seven billion light-years away from us. The discovery, made possible by combining two of the most powerful ground-based telescopes in the world, is the first observation of such a prominent galaxy structure in the distant Universe, providing further insight into the cosmic web and how it formed.
Read more ....
Frozen, Hard To Reach, And Worth It
From Live Science:
A recent photo captured by a NASA research airplane shows a giant iceberg in the Antarctic.
The photo, taken Oct. 21, was part of the space agency's Operation Ice Bridge airborne Earth science mission to study ice sheets, sea ice, and ice shelves at the bottom of the world.
Read more ....