The Science Behind The Explosives Used On Northwest Airlines Flight 253 And By The 'Shoe Bomber'

PETN

PETN - Hard To Detect And Just 100g Can Destroy A Car -- The Guardian

The science behind the explosive pentaerythritol trinitrate, used on Northwest Airlines flight 253 and by the 'shoe bomber'.

The explosive that nearly brought down Northwest Airlines flight 253 is extremely powerful, allowing terrorists to use only small quantities to cause enormous damage. And the colourless crystals of the substance, PETN or pentaerythritol trinitrate, are hard to detect if carried in a sealed container.

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The Grouse's Wishes For A Happy, Techy 2010

From Popular Science:

There goes 2009, and what a year she was. Let’s see, the iTunes App Store eclipsed one billion downloads, Google surprised us all with the announcement of Chrome OS, Windows 7 sent Vista to the big Blue Screen of Death in the sky, Verizon and AT&T started fighting dirty and the e-reader market exploded. But instead of looking back at the year that was, we of course always find it a lot more fun to look forward. So, here’s what’s on my wish list for the year to come in gadgets and tech.

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Women 'Can Sense Attraction In Men's Sweat'

The smell of a man's sweat differs according to what mood he is in Photo: AFP/GETTY

From The Independent:

Women can sense if men are attracted to them by the smell of his sweat, a new study has revealed.

The smell of a man's sweat differs according to what mood he is in and women can pick up on changes that indicate attraction, according to new research.

The study, led by Dr Denise Chen, assistant professor of psychology at Rice University, in Texas, America, involved introducing two types of male sweat to 19 women in their 20s - one type was labelled 'normal', the other 'sexual'.

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Cao Cao: Chinese Archaeologists Uncover Vast Tomb Of Infamous 3rd Century Ruler

The austere interior of Cao Cao's tomb. He ruled the Kingdom of Wei from 208 to 220 AD.

From The Daily Mail:

Chinese archaeologists have found what could be the tomb of Cao Cao, a skilful general and ruler in the third century who was later depicted in popular folklore as the archetypal cunning politician.

Archaeological officials say Cao's 8,000 sq ft tomb complex, with a 130ft passage leading to an underground chamber, was found in Xigaoxue, a village near the ancient capital of Anyang in central Henan province.

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2009 Review: Most Popular Articles Of The Year

New Scientist solves 10 mysteries of you

From New Scientist:

2009 was a year of economic austerity, worries about climate change and ongoing turmoil in the Middle East. It was, on the whole, a bit grim.

But you'd never know it from looking at our website monitoring software, which suggests that New Scientist readers were more concerned with how to decode ancient languages, the nature of female ejaculation and whether the cosmos is really a giant hologram.

In ascending order, here are the 12 most popular articles of 2009 – one for each of the days of Christmas.

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Technology Changes 'Outstrip' Netbooks

Netbooks are under pressure as tech firms concentrate on mobile computing.

From The BBC:

Rising prices and better alternatives may mean curtains for netbooks.

The small portable computers were popular in 2009, but some industry watchers are convinced that their popularity is already waning.

"The days of the netbook are over," said Stuart Miles, founder and editor of technology blog Pocket Lint.

As prices edge upwards, net-using habits change and other gadgets take on their functions, netbooks will become far less popular, he thinks.

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As The World Churns: Earth's Liquid Outer Core Is Slowly 'Stirred' In A Series Of Decades-Long Waves

By combining measurements of Earth's magnetic field from stations on land and ships at sea with satellite data, scientists were able to isolate six regularly occurring waves of motion taking place deep within Earth's liquid core, with varying timescales. (Credit: NASA/JPL)

From Science Daily:

Science Daily (Dec. 28, 2009) — Most of the time, at least from our perspective here on the ground, Terra firma seems to be just that: solid. Yet the Earth beneath our feet is actually in constant motion. It moves through time and space, of course, along with the other objects in the universe, but it moves internally as well.

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Body Of Sea Urchin Is One Big Eye

A purple sea urchin, Credit: Claire Fackler, NOAA National Marine Sanctuaries

From Live Science:

Sea urchins may use the whole surface of their bodies as compound eyes, scientists now suggest.

Although sea urchins don't have any problems avoiding predators or finding comfortable dark corners to hide in, they don't have eyes. The question then is how they see.

Genetic analysis of sea urchins has revealed they have light-sensitive molecules, mostly in their tube feet and in tiny stalked appendages found in among their spines. As such, "it looks like the entire surface of their bodies are acting as one big eye," said researcher Sönke Johnsen, a marine biologist at Duke University.

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Google Netbook Specs Reportedly 'Leaked'

From eWeek:

The rumored Google Netbook, which Google has not confirmed it is working on, will reportedly feature Google’s Chrome OS, a 10.1-inch multi-touch display, a beefy ARM processor and 2GB of RAM, according to the U.K.’s IBTimes, which says it has received specs for the netbook.

Tech specifications for the netbook that Google is rumored to be creating have been “leaked,” according to England’s IBTimes.

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The Top 9 Airplane Tech Advances Of The Last 10 Years

Northrop Grumman RQ-4 Global Hawk

From Popular Mechanics:

The aughts capped 100 years of powered flight, pushing the technologies introduced in the 20th century to their limits. This past decade has seen the development of the biggest passenger airplanes, the fastest, most agile and stealthiest fighters, and the joy of flight brought to the amateur pilot as never before. The coming decade promises breakthroughs such as combat-ready unmanned aerial vehicles, commercial rocket planes, hypersonic jets, and more. Here's a look back at the aviation milestones of the aughts and a glimpse of what the coming decade might hold.

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Your Guide To The Year In Science: 2010

Exclusive Patent Rights Countdown Coherentimages.com

From Popular Science:

A deeper look at polar ice. An electric-car renaissance. The death and rebirth of major scientific experiments. Read on to discover what this year has in store.

Our annual sci-tech forecast looks at what 2010 has in store for medicine, space, aviation, the environment, technology and entertainment.

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Large Hadron Collider Failure Will Leave Science Back In The 'Wilderness'

Particle tracks of protons collided in CERN's Large Hadron Collider Photo: AP

From The Telegraph:

Science will be left back in a "nightmarish wilderness" if the Large Hadron Collider fails to find the elusive Higgs Boson, warns a rebel physicist.

Former Harvard research scholar, professor Shahriar Afshar said that failure to find the particle would bring current scientific theory tumbling down like a house of cards with nothing to replace it.

The controversial physicist, whose Afshar experiment has already found a loophole in quantum theory, said that unless the scientific community starts contemplating a "plan B", failure could lead to "chaos and infighting".

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At Last! Apple Tablet Is Slated For Launch In January

Industry experts believe the 'iSlate' - a cross between an iPhone and a laptop - could signal the end of the keyboard and mouse system

From The Daily Mail:

Over the past decade the iPod has revolutionised the way we listen to music, and the iPhone is the must-have gadget when it comes to mobile phones.
So it seems entirely fitting that Apple should choose the start of a new decade to launch its latest product - which could entirely change the way we use computers.

Rumours are rife that Steve Jobs, the company's chief executive, is planning to unveil a touch screen computer known as the 'iSlate' at the end of next month.

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Sugar-Free Satisfaction: Finding The Brain's Sweet Spot

The calorie-free version fails to activate a reward area of the brain
(Image: Patrick Norman/Fancy/Plainpicture)

From New Scientist:

CONTAINS zero calories! Countless soft drinks are emblazoned with that slogan as a come-on for those of us locked in a never-ending battle to rein in a spreading waistline. Calorie-free sweeteners certainly have a lot to offer. Food and drink manufacturers have become so good at blending sugar substitutes into their products that it can be almost impossible to tell them apart from the real thing - sucrose - in taste tests.

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Pulling The 'Mating Plug' May Reduce Mosquito Population And Malaria Rates

A malaria-carrying Anopheles gambiae mosquito. About 40% of the world's population is at risk of malaria, a potentially deadly disease. (CDC / December 26, 2009)

From The L.A. Times:

Scientists find that reproduction fails when they interfere with the enzyme that causes the plug to form. The team hopes the finding can be developed for use in the field.

Interfering in mosquitoes' sex lives could help halt the spread of malaria, British scientists said this week.

A study on the species of mosquito mainly responsible for malaria transmission in Africa, Anopheles gambiae, showed that because these mosquitoes mate only once in their lives, meddling with that process could dramatically cut their numbers.

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Disinfectants 'Train' Superbugs To Resist Antibiotics

From The BBC:

Disinfectants could effectively train bacteria to become resistant to antibiotics, research suggests.

Scientists know bacteria can become inured to disinfectant, but research increasingly shows the same process may make them resistant to certain drugs.

This can occur even with an antibiotic the bacteria have not been exposed to.

Writing in Microbiology, the National University of Ireland team, who focused on a common hospital bacterium, urges a rethink of how infections are managed.

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Amazon E-Book Sales Overtake Print For First Time

In the US, Amazon says its Kindle e-book reader is its most gifted product.
Photograph: Mario Tama/Getty Images

From The Guardian:

Online retailer may be on target for sales of 500,000 Kindle e-readers over Christmas.

Spare a thought for the humble hardback this Christmas. It seems the traditional giftwrapped tome is being trumped by downloads, after Amazon customers bought more e-books than printed books for the first time on Christmas Day.

As people rushed to fill their freshly unwrapped e-readers – one of the top-selling gadgets this festive season – the online retailer said sales at its electronic book store quickly overtook orders for physical books. Its own e-reader, the Kindle, is now the most popular gift in Amazon's history.

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Neuroscientists Store Information in Isolated Brain Tissue; Possible Basis Of Short-Term Memory

Location of the hippocampus in the human brain. Modified from a scan of a plate of "Posterior and inferior cornua of left lateral ventricle exposed from the side" in Gray's Anatomy. (Credit: Courtesy of Wikipedia)

From Science Daily:

Science Daily (Dec. 28, 2009) — Ben W. Strowbridge, PhD, associate professor of neuroscience and physiology/biophysics, and Phillip Larimer, PhD, a MD/PhD student in the neurosciences graduate program at Case Western Reserve University School of Medicine, are the first to create stimulus-specific sustained activity patterns in brain circuits maintained in vitro.

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Airport Security: Why It Failed

From Live Science:

Airport screening procedures failed for many reasons to catch the Nigerian man who aimed to blow up flight 253 as it approached Detroit. Scanners that might have spotted the explosives are not fully deployed, and even at airports where they exist, the scanners aren't used on all passengers.

Bottom line: No system will likely prove foolproof, experts say.

Investigators say 23-year-old Nigerian Umar Farouk Abdul Mutallab hid an explosive device and the chemical explosive PETN on his body while traveling from Amsterdam to Detroit aboard the Delta flight on Christmas day.

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Once In A Blue Moon To Happen Thursday

From Mercury News:

Once in a blue moon is about to happen.

On Thursday, a second full moon in a calendar month will appear in the night sky, an occurrence known as a blue moon.

There has not been a month with two full moons since 2007, when sky gazers enjoyed one on June 1 and again on June 30 of that year. The first full moon this month occurred on Dec. 2.

The phrase "blue moon" has nothing to do with the color of the sphere, explained Conrad Jung, a staff astronomer at the Chabot Space & Science Center in Oakland. "It's just a colloquial term, which means very, very rare," he said.

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