Search On For Death Star That Throws Out Deadly Comets

This diagram shows a brown dwarf in relation to Earth, Jupiter, a low-mass star and the sun.
Photo: NASA

From The Telegraph:

Nasa scientists are searching for an invisible 'Death Star' that circles the Sun, which catapults potentially catastrophic comets at the Earth.

The star, also known as Nemesis, is five times the size of Jupiter and could be to blame for the impact that wiped out the dinosaurs 65 million years ago.

The bombardment of icy missiles is being blamed by some scientists for mass extinctions of life that they say happen every 26 million years.

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Replica Of Big Skull From 28,000 Years Ago Suggests Human Brains Have Started To Shrink

Old big head: A 3D image replica of the skull shows it was 20% larger than ours

From The Daily Mail:

Our brains are shrinking, according to scientists who have recreated a 28,000-year-old skull from remains found in France.

The French team, which claims to have produced one of the best replicas yet of an early modern human’s cranium, says it is up to 20 per cent bigger than ours.

No one is suggesting this means our ancestors were more intelligent as studies have found there is only a minor link between brain size and IQ.

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Scientists Identify Driving Forces In Human Cell Division

Metaphase in a human cervical carcinoma (HeLa) cell. Chromosomes (red), microtubules (green). (Credit: Jason Swedlow, University of Dundee)

From Science Daily:

Science Daily (Mar. 14, 2010) — If you can imagine identical twin sisters at rest, their breath drawing them subtly together and apart, who somehow latch onto ropes that pull them to opposite sides of the bed -- you can imagine what happens to a chromosome in the dividing cell.

Understanding the forces that drive chromosome segregation -- a crucial aspect of human development and some diseases, including cancer -- is the goal of an international group of researchers who collaborate each summer at the MBL.

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What Does The Achilles Tendon Do?

The Achilles tendon, pictured here, connects the calf muscle to the heel bone. Credit: NIH

From Live Science:

The injury sustained to soccer star David Beckham's left foot has fans worried the athlete will miss the World Cup, but injuries to the Achilles tendon are no stranger to athletes and the less-conditioned "weekend warriors" alike.

The Achilles tendon is a band of fibrous tissue that connects the calf muscle to the heel bone, according to the Mayo Clinic. You use this tendon in practically every activity that involves moving your foot, from walking and running to jumping and standing on tip-toe. It's also the largest tendon in your body, and can withstand more than 1,000 pounds of force, according to the American Academy of Orthopedic Surgeons (AAOS).

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Electronics 'Missing Link' Brings Neural Computing Closer

Coming soon to a CPU near you (Image: Patrick Landmann/SPL)

From New Scientist:

WHEN the "missing link of electronics" was finally built in 2008, it was the vindication of a 30-year-old prediction. Now it seems the so-called memristor can behave uncannily like the junctions between neurons in the brain.

A memristor is a device that, like a resistor, opposes the passage of current. But memristors also have a memory. The resistance of a memristor at any moment depends on the last voltage it experienced, so its behaviour can be used to recall past voltages.

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The iPad Developer's Challenge

Griffin's iTalk app for iPhone
(Credit: Griffin)

From CNET News:

iPhone and iPod Touch owners could breathe a sigh of relief when Steve Jobs unveiled the iPad.

Apple's highly anticipated tablet computer would not, after all, require purchasing all new applications. Instead, everything in the App Store would automatically work on the iPad. As Jobs explained, tapping one button on the iPad screen transforms apps made for the 3.1-inch iPhone/iPod Touch screen to a snugger fit on the 9.7-inch iPad.

Simple, right? For the iPad owner, sure. But the iPad means bigger changes for the people who create these apps. Though the iPad has been dismissed by some as an oversized iPod Touch, it's definitely not, as those who attempt to make iPad apps or re-create iPhone apps for it will find out fast.

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SpaceX Fires Up

From Discovery News:

In case you've been wondering, that's what a fully lit Falcon 9 rocket looks like at ignition, which occurred, by the way, for the first time this weekend at Cape Canaveral Air Force Station in Florida, where SpaceX is preparing for the rocket's debut flight next month.

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Weymouth Ridgeway Skeletons 'Scandinavian Vikings'

From The BBC:

Fifty-one decapitated skeletons found in a burial pit in Dorset were those of Scandinavian Vikings, scientists say.

Mystery has surrounded the identity of the group since they were discovered at Ridgeway Hill, near Weymouth, in June.

Analysis of teeth from 10 of the men revealed they had grown up in countries with a colder climate than Britain's.

Archaeologists from Oxford believe the men were probably executed by local Anglo Saxons in front of an audience sometime between AD 910 and AD 1030.

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Cyberguards To Protect Children

Image: Demand for digital monitors from concerned parents is expected to grow. (Alamy)

From The Independent:

Technology that allows parents to monitor and even block a child’s online and mobile activity is coming to Britain soon.

Do you know what your teenager is doing on the computer in their bedroom? What websites they are visiting and who they are poking on Facebook? American parents do. A raft of new technology designed to enable mums and dads to keep tabs on their children in cyberspace is hitting the market across the Atlantic.

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Babies Are Born To Dance To The Beat

From The Telegraph:

Babies are born to dance and find the rhythm and tempo of music more engaging than speech, research has shown.

A study of infants aged from five months to two years suggests that babies are preprogrammed to move rhythmically in response to music.

Psychologist Marcel Zentner, who led the University of York team, said: "Our research suggests that it is the beat rather than other features of the music, such as the melody, that produces the response in infants.

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Hitwise: Facebook Tops Weekly Ranking, Surpassing Google

From Wall Street Journal:

Facebook Inc. edged past Google Inc. (GOOG) to become the most visited U.S. Web site for the week ended March 13, the first time the Internet giant has been topped since 2007, according to Hitwise.

The data provider said the privately held social-networking site's share was 7.07% for the week, compared with Google's 7.03%. The market share of visits to Facebook nearly tripled from a year earlier for the week, while visits to Google grew 9%.

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Twitter Astronaut Is First To Post Stunning YouTube Videos Direct From Space

From The Daily Mail:

Astronaut Soichi Noguchi has already made his name as a prolific Twitterer, who delights his 125,000 followers with live pictures from the International Space Station.

Now the Japanese engineer has gone one better, posting stunning footage of Earth and the Moon on his own YouTube channel.

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U.S. Army Worried About Wikileaks In Secret Report

From CNET News:

A leaked U.S. Army intelligence report, classified as secret, says the Wikileaks Web site poses a significant "operational security and information security" threat to military operations.

Classified U.S. military information appearing on Wikileaks could "influence operations against the U.S. Army by a variety of domestic and foreign actors," says the report, prepared in 2008 by the Army Counterintelligence Center and apparently disclosed in its entirety on Monday.

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Small Dogs Originated In The Middle East, Genetic Study Finds

Yorkshire terrier. (Credit: iStockphoto/Lenka Dankova)

From Science Daily:

Science Daily (Mar. 13, 2010) — A genetic study has found that small domestic dogs probably originated in the Middle East more than 12,000 years ago. Researchers writing in the open access journal BMC Biology traced the evolutionary history of the IGF1 gene, finding that the version of the gene that is a major determinant of small size probably originated as a result of the domestication of the Middle Eastern gray wolf.

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Quest Aims To Create Bigger Atoms And New Kinds Of Matter

Heavy elements like atomic number 118 were created by smashing calcium-48 ions into americium-243 target atoms, shown in this illustration. Credit: Thomas Tegge, Lawrence Livermore National Laboratory

From Live Science:

A quest is underway to create larger and larger atoms with more protons and neutrons than ever before.

By building these super-heavy elements, scientists are not just creating new kinds of matter – they are probing the subatomic world and learning about the mysterious forces that hold atoms together.

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Opium Poppy's Genes Finally Revealed

Opium crop from the Malwa region of India. Credit: Wikimedia

From Cosmos/AFP:

PARIS: Researchers have discovered the genes that allow the opium poppy to make codeine and morphine, which could lead to genetically engineered plants or microorganisms generating the painkillers.

Codeine is one of the most widely prescribed painkillers in the world, the researchers said. Unlike morphine, codeine cannot be easily converted to heroin.

"The enzymes encoded by these two genes have eluded plant biochemists for a half-century," said Peter Facchini, from the University of Calgary in Canada and co-author of the paper.

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Celebrating The Real Einstein

From New Scientist:

Today is Einstein's birthday - and it's time to celebrate.

Everyone loves to celebrate Einstein. He's a movie, an opera, an asteroid, a cartoon. He's an advertisement for a Danish beer. Rock bands exist with names like Einstein's Sister and Forever Einstein. He graces the periodic table of elements--Einsteinium, atomic number 99. People have designed religions around Einstein. His brain was stolen, sliced up into nearly two hundred and fifty pieces, and sent bit by bit through the mail to the curious around the globe.

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RealNetworks: A Tale Of Opportunities Missed

Rob Glaser with Bill Gates. Glaser left Microsoft in 1994.
(Credit: Microsoft)

From CNET News:

Rob Glaser's 16 years at the helm of RealNetworks started with the pioneering of the early dot-com days and ended with a courtroom drubbing at the hands of the entertainment industry. In between, Glaser, who by most accounts saw the promise of Web video and music long before his peers, proved himself to be a better visionary than executive.

Earlier this month, Real announced it was giving up on attempts to defend its RealDVD technology against a lawsuit filed by the major movie studios. RealDVD is software that enabled users to create copies of their film discs and store the digital versions on hard drives. It was also the backbone of a planned DVD player, code-named Facet. The device would copy and hold 70 digital movies and enable users to instantly jump from film to film and scene to scene.

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Why Do We Have Daylight Savings Time?

From Discovery news:

It's a question people are probably more likely to ask themselves this time of year when we go to bed and then lose an hour. It can feel wildly unfair for the clock to say 7:00 a.m. when it actually feels like 6:00 a.m.

Well, to some degree we may have Benjamin Franklin to thank.

Franklin, who penned the proverb, "Early to bed and early to rise, makes a man healthy, wealthy and wise," was among the first to suggest the idea. In a 1784 essay he wrote that adjusting the clocks in the spring could be a good way to save on candles.

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Obama Nasa Plans 'Catastrophic' Say Moon Astronauts

From The BBC:

Former Nasa astronauts who went to the Moon have told the BBC of their dismay at President Barack Obama's decision to push back further Moon missions.

Jim Lovell, commander of the ill-fated Apollo 13 mission, said Mr Obama's decision would have "catastrophic consequences" for US space exploration.

The last man on the Moon, Eugene Cernan, said it was "disappointing".

Last month Mr Obama cancelled Nasa's Constellation Moon landings programme, approved by ex-President George W Bush.

Nasa still aims to send astronauts back to the Moon, but it is likely to take decades and some believe that it will never happen again.

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