Containing The Sahara With Bacteria-Built Walls

From Popsci.com:

Bacteria that construct walls out of sand could save a third of the world's population from desertification

The Sahara, as well as other deserts around the world, is growing, in a process called desertification that ends up displacing people and crops. The situation has become drastic in a number of sub-Saharan countries. One suggestion from architect Magnus Larsson at the recent TED Global conference suggests constructing a massive wall, 3,700 miles long -- built from the sand itself. The trick would be to use bacterial labor to build it.

Read more ....

Transparent Aluminum Is ‘New State Of Matter’

Experimental set-up at the FLASH laser used to discover the new state of matter. (Credit: Image courtesy of University of Oxford)

From Science Daily:

ScienceDaily (July 27, 2009) — Oxford scientists have created a transparent form of aluminium by bombarding the metal with the world’s most powerful soft X-ray laser. ‘Transparent aluminium’ previously only existed in science fiction, featuring in the movie Star Trek IV, but the real material is an exotic new state of matter with implications for planetary science and nuclear fusion.

In the journal Nature Physics an international team, led by Oxford University scientists, report that a short pulse from the FLASH laser ‘knocked out’ a core electron from every aluminium atom in a sample without disrupting the metal’s crystalline structure. This turned the aluminium nearly invisible to extreme ultraviolet radiation.

Read more ....

Divorce Hurts Health Even After Remarriage

From Live Science:

Divorce can wreak havoc on a person's health, even after remarriage, a new study finds.

Scientists have known that marriage can boost a man's health and augment a women's purse. The new study shows that divorce or losing a spouse to death can exact an immediate and long-lasting toll on those mental and physical gains.

"That period during the time that this event is taking place is extremely stressful," said study researcher Linda Waite, a sociologist and director of the Center on Aging at the National Opinion Research Center at the University of Chicago. "People ignore their health; they're stressed, which is itself a health risk; they're less likely to go to the doctor; they're less likely to exercise; they're sleeping poorly."

Read more ....

My Comment: My friends who are divorce will probably agree with this.

Gray Hair Caused by Stress (Cell Stress, That Is)

DNA damage from chemicals, ultraviolet light, and ionizing radiation can turn hair gray (above, an elderly man in Lincoln, Nebraska), according a June 2009 study that examined hair color cells in mice. Photograph by Joel Sartore/NGS

From National Geographic:

Work or personal stress may make you want to pull your hair out, but it's cellular stress that actually turns it gray, a new study has found.

That's because DNA is "under constant attack" by damaging agents, such as chemicals, ultraviolet light, and ionizing radiation, according to study lead author Emi Nishimura of Tokyo Medical and Dental University.

Read more ....

Gentlemen, You've Never Had It So Good: Women Are Getting More Attractive In Evolutionary 'Beauty Race'

From The Daily Mail:

They are called the fairer sex – and it appears it is becoming increasingly true.

Women are gradually becoming more attractive in an evolutionary ‘beauty race’, according to scientific research.

Beautiful women have more children than their plainer counterparts, and a higher proportion of those children are girls, a study claims.

These daughters, once adult, also tend to be attractive and so the pattern continues.

Read more ....

A Vaccine For Colon Cancer

Colon cancer: This x-ray image shows a barium enema in a patient with cancer of the bowel. Credit: Centers for Disease Control

From Technology Review:

A new approach to preventing cancer teaches the immune system to seek and destroy emerging tumors.

A cancer vaccine with a twist is making headway in clinical trials at the University of Pittsburgh School of Medicine. Rather than targeting a cancer-related virus--the way Gardasil targets human papillomavirus to prevent some cervical cancers--the new vaccine triggers the immune system to attack a faulty protein that's often abundant in colorectal cancer tissue and precancerous tissue.

Read more ....

Human History Written in Stone and Blood

Figure 1. Hunter-gatherer people living in southern Africa in the Middle Stone Age left behind artifacts in natural rock shelters and caves. At top is Sibudu Cave, located about 40 kilometers north of Durban. Below that is Ntloana Tsoana, a rock shelter located on the south bank of the Phuthiatsana River in the Lesotho highlands. At bottom, right of center in the photo, is Blombos Cave, located about 300 kilometers east of Cape Town. That’s where archaeologists found artifacts representing innovative behavior previously thought to have emerged in Europe much later. Improved dating of such artifacts helped the authors evaluate what contemporary factors might have contributed to the origins of modern human behavior.

Top photograph courtesy of Lyn Wadley. Middle photograph courtesy of Richard Roberts. Bottom photograph courtesy of Chris Henshilwood.

From American Scientist:

Two bursts of human innovation in southern Africa during the Middle Stone Age may be linked to population growth and early migration off the continent.

In the past decade it has become clear that symbolic expression associated with modern human behavior began in Africa, not Europe. And it occurred tens of thousands of years earlier than was once thought. Answering why is difficult. A first step was more reliable dating of when culturally and technologically advanced people lived during the Middle Stone Age in the south of Africa. Zenobia Jacobs and Richard G. Roberts accomplished that dating, which prompted them to reject climate change as a primary cause for the advancements. Instead, drawing on genetic research, they embrace population growth as a likely, key influence.

Read more ....

GM Crop Trials Start Again In Britain In 'Secret': Report

Photo illustration of potatoes. Genetically modified crops are being grown in Britain for the first time in 12 months after controversial trials were resumed without alerting the public, a newspaper reported Monday. (AFP/File/Omar Torres)

From Yahoo News/AFP:

LONDON (AFP) – Genetically modified crops are being grown in Britain for the first time in 12 months after controversial trials were resumed without alerting the public, a newspaper reported Monday.

Cultivation of a field of potatoes designed to be resistant to pests was abandoned more than a year ago when environmental protesters ripped up the crop, the Daily Telegraph said.

But, without alerting the public, the project near Tadcaster in northern England has been restarted, prompting warnings from green groups that local farms and residents could be put at risk, the newspaper said.

One group accused the government of trying to "slip it under the radar."

Read more ....

Red Wine Increases Women's Sexual Desire

Chemical compounds found in red wine may improve blood flow Photo: GETTY

From The Telegraph:

A glass or two of red wine may increase a woman's libido, a scientific study has found.

Researchers concluded that levels of sexual desire were higher in women who were moderate drinkers of red wine than in their counterparts who preferred other alcoholic drinks, or were teetotal.

One theory put forward by the team of Italian doctors who carried out the study is that chemical compounds found in red wine may improve sexual functioning by increasing blood flow to key areas of the body.

Read more ....

Climate Study Puts Incas’ Success Down To 400 Years Of Warm Weather

The Inca City of Machu Picchu was built during the 400-year warm spell,
scientists say. (Paolo Aguilar/EPA)

From Times Online:

Supreme military organisation and a flair for agricultural invention are traditionally credited for the rise of the Incas. However, their success may have owed more to a spell of good weather — a spell that lasted for more than 400 years.

According to new research, an increase in temperature of several degrees between AD1100 and 1533 allowed vast areas of mountain land to be used for agriculture for the first time. This fuelled the territorial expansion of the Incas, which at its peak stretched from the modern Colombian border to the middle of Chile.

“Yes, they were highly organised, and they had a sophisticated hierarchical system, but it wouldn’t have counted a jot without being underpinned by the warming of the climate,” says Dr Alex Chepstow-Lusty, a palaeo-ecologist from the French Institute for Andean Studies in Lima, Peru.

Read more ....

Bacteria Make Computers Look Like Pocket Calculators

Scanning electron micrograph of E. coli bacteria. A rapidly growing colony can be programmed to act as a hugely powerful parallel computer. Photograph: Getty

From The Guardian:

Biologists have created a living computer from E. coli bacteria that can solve complex mathematical problems.

Computers are evolving – literally. While the tech world argues netbooks vs notebooks, synthetic biologists are leaving traditional computers behind altogether. A team of US scientists have engineered bacteria that can solve complex mathematical problems faster than anything made from silicon.

Read more ....

Race Is On For Space-Junk Alarm System

Image: Keeping an eye on the increasing amount of space debris is no easy task (Image: European Space Agency / Rex Features)

From New Scientist:

A WORLDWIDE network of radar stations could tackle the ever-growing problem of space debris - the remains of old rockets and satellites that pose an increasing threat to spacecraft.

The US government is launching a competition, which will run until the end of 2010, to find the best way of tracking pieces of junk down to the size of a pool ball. Three aerospace companies - Northrop Grumman, Lockheed-Martin and Raytheon - have each been awarded $30 million by US Air Force Space Command to design a "space fence" that will constantly report the motion of all objects 5 centimetres wide and larger in medium and low-Earth orbits.

Read more ....

China Web Users Outnumber US Population: Report

From Breitbart/AFP:

The number of Internet users in China is now greater than the entire population of the United States, after rising to 338 million by the end of June, state media reported Sunday.

China's online population, the largest in the world, rose by 40 million in the first six months of 2009, the official Xinhua news agency reported, citing a report by the China Internet Network Information Center.

The number of broadband Internet connections rose by 10 million to 93.5 million in the first half of the year, the report said.

Read more ....

Silicon With Afterburners: New Process Could Be Boon To Electronics Manufacturer

Image: Scientists at Rice University and North Carolina State University have found a method of attaching molecules to semiconducting silicon that may help manufacturers reach beyond the current limits of Moore's Law as they make microprocessors both smaller and more powerful. (Credit: Image courtesy of Rice University)

From Science Daily:

ScienceDaily (July 24, 2009) — Scientists at Rice University and North Carolina State University have found a method of attaching molecules to semiconducting silicon that may help manufacturers reach beyond the current limits of Moore's Law as they make microprocessors both smaller and more powerful.

Moore's Law, suggested by Intel co-founder Gordon Moore in 1965, said the number of transistors that can be placed on an integrated circuit doubles about every two years. But even Moore has said the law cannot be sustained indefinitely.

Read more ....

Why Raindrops Fall In Different Sizes

Fragmentation of a 5 millimeters in diameter drop falling by its own weight relative to an ascending stream of air. The overall sequence lasts for 60 milliseconds. This process is responsible for the formation of the raindrops which wet the ground. Credit: Emmanuel Villermaux

From Live Science:

The raindrops that patter onto roofs, sidewalks and umbrellas during a shower or storm fall in a wide range of sizes, as anyone who pays attention can see. The explanation for this variety turns out to be much simpler than scientists thought.

Experts have long thought that the size differences observed in natural raindrops was due to the same complex interactions of droplets that form raindrops in clouds. But a new study finds that the best explanation for the motley size assortment is that the raindrops released from the clouds break up into smaller drops as they fall.

Read more ....

Splashdown! The Ship That Picked Up the Apollo 11 Astronauts

From Wired Science:

ALAMEDA — The USS Hornet was on hand 40 years ago to pick up the Apollo 11 astronauts after their Columbia Command Module splashed down in the Pacific Ocean on July 24, 1969.

Today, the aircraft carrier is preserved as a museum in Alameda, California. Its main deck is littered with historic warplanes and space artifacts including an Apollo command module and Mobile Quarantine Facility from subsequent missions, pictured below. The first footsteps the Apollo 11 crew took on Earth after walking on the moon are traced on the deck.

Read more ....

Scientists Worry Machines May Outsmart Man

This personal robot plugs itself in when it needs a charge. Servant now, master later?
Ken Conley/Willow Garage

From The New York Times:

A robot that can open doors and find electrical outlets to recharge itself. Computer viruses that no one can stop. Predator drones, which, though still controlled remotely by humans, come close to a machine that can kill autonomously.

Impressed and alarmed by advances in artificial intelligence, a group of computer scientists is debating whether there should be limits on research that might lead to loss of human control over computer-based systems that carry a growing share of society’s workload, from waging war to chatting with customers on the phone.

Read more ....

What And When Is Death?

From The New Atlantis:

All living things die. This is not new and it has nothing to do with technology. What is new in our technological age, however, is an uncertainty about when death has come for some human beings. These human beings, as an unintended consequence of efforts to prevent death, are left suspended at its threshold. Observing them in this state of suspension, we, the living, have a very hard time knowing what to think: Is the living being still among us? Is there still a present for this person or has the long reign of the past tense begun: Is he or was he? The phenomenon is popularly known as “brain death,” but the name is misleading. Death accepts no modifiers. There is only one death. Has it occurred or not? Alive or dead?

Read more ....

Bluefin Tuna Species Racing Toward Extinction

Bluefin Tuna

From Future Pundit:

A Wired article reports on efforts of scientists to breed and raise tuna in captivity in order to save wild tuna from extinction. While the scientific results in Australia and elsewhere look promising the news about tuna in the wild looks pretty grim.

News of breeding success comes with the three bluefin species — Northern, Southern and Pacific — speeding towards extinction, the victim of something close to a marine version of the 19th century buffalo slaughter. In the last 30 years, bluefin populations around the world have collapsed. Fishing fleets with spotter planes have chased ever-smaller, ever-younger fish, catching them at sea and hauling them to shoreline pens to be fattened and killed before they’re even old enough to reproduce.

Read more ....

New Flu Treatment Outsmarts Mutations

Candy Coated: A new treatment targets “lollipop” molecules on the flu’s surface. Russell Kightley/Photo Researchers

From Popsci.com:

A new drug could foil any outbreak.

Before swine flu swept through the U.S., the virus had bounced around South America undetected for years. The H1N1 strain caught scientists by surprise, and without a vaccine. But a few weeks before the first North American case popped up, researchers successfully tested a therapy that could knock out almost any flu, and possibly any virus.

Read more .....