Why We Walk in Circles

Into the woods. People walking through a forest were more likely to walk in circles on cloudy days (blue paths) than they were on days when the sun was visible (yellow paths). Credit: (Map) Adapted from Google Earth by J. L. Souman et al., Current Biology 19 (20 August 2009); (inset: Jan Souman)

From Science Now:

Adventure stories and horror movies ramp up the tension when hapless characters walk in circles. The Blair Witch Project, for example, wouldn't have been half as scary if those students had managed to walk in a straight line out of the forest. But is this navigation glitch real or just a handy plot device? A new study finds that people really do tend to walk in circles when they lack landmarks to guide them.

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End Of Civil War Opens Up Angolan 'Jurassic Park'

Fossils are seen in the Bentiaba desert, southern province of Namibe in Angola. Much of Angola's fossil richness results from dramatic continental shifts tens of millions of years ago, which saw the land transform from desert to tropics. (AFP/HO/File/Anne Schulp)

From Yahoo News.AFP:

LUANDA (AFP) – Angola is best known for oil and diamonds, but dinosaur hunters say the country holds a "museum in the ground" of rare fossils -- some actually jutting from the earth -- waiting to be discovered.

"Angola is the final frontier for palaeontology," explained Louis Jacobs, of Southern Methodist University in Dallas, Texas, part of the PaleoAngola project which is hunting for dinosaur fossils.

"Due to the war, there's been little research carried out so far, but now we're getting in finally and there's so much to find.

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Building Safer Airplanes Out of Teeth

Smile for Airplane Safety!: Curtiss P-40 Warhawk USAF Museum

From Popular Science:

In a recent study, molars beat materials science.

Airplane design could be improved with a little inspiration from mammalian chompers. Or so said aerospace engineer Herzl Chai of Tel Aviv University in a press release Wednesday.

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The Origin of Zero

ZERO IN: The number zero developed in fits and starts over thousands of years.
©iStockphoto/dbuffoon

From Scientific American:

Much ado about nothing: First a placeholder and then a full-fledged number, zero had many inventors.

The number zero as we know it arrived in the West circa 1200, most famously delivered by Italian mathematician Fibonacci (aka Leonardo of Pisa), who brought it, along with the rest of the Arabic numerals, back from his travels to north Africa. But the history of zero, both as a concept and a number, stretches far deeper into history—so deep, in fact, that its provenance is difficult to nail down.

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A Look Into The Hellish Cradles Of Suns And Solar Systems

The dense star cluster RCW 38 glistens about 5500 light years away in the direction of the constellation Vela (the Sails). RCW 38 is an "embedded" cluster, in that the nascent cloud of dust and gas still envelops its stars. (Credit: Image courtesy of ESO)

From Science Daily:

ScienceDaily (Aug. 20, 2009) — New images released today by ESO delve into the heart of a cosmic cloud, called RCW 38, crowded with budding stars and planetary systems. There, young stars bombard fledgling suns and planets with powerful winds and blazing light, helped in their task by short-lived, massive stars that explode as supernovae. In some cases, this onslaught cooks away the matter that may eventually form new solar systems. Scientists think that our own Solar System emerged from such an environment.

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Human Lifespans Nearly Constant for 2,000 Years

From Live Science:

The Centers for Disease Control and Prevention, often the harbinger of bad news about e. coli outbreaks and swine flu, recently had some good news: The life expectancy of Americans is higher than ever, at almost 78.

Discussions about life expectancy often involve how it has improved over time. According to the National Center for Health Statistics, life expectancy for men in 1907 was 45.6 years; by 1957 it rose to 66.4; in 2007 it reached 75.5. Unlike the most recent increase in life expectancy (which was attributable largely to a decline in half of the leading causes of death including heart disease, homicide, and influenza), the increase in life expectancy between 1907 and 2007 was largely due to a decreasing infant mortality rate, which was 9.99 percent in 1907; 2.63 percent in 1957; and 0.68 percent in 2007.

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Artificial Life Will Be Created 'Within Months' As Genome Experts Claim Vital Breakthrough

Breakthrough: New DNA was protected by a process called methylation (step 5)

From The Daily Mail:

Scientists are only months away from creating artificial life, it was claimed today.

Dr Craig Venter – one of the world’s most famous and controversial biologists – said his U.S. researchers have overcome one of the last big hurdles to making a synthetic organism.

The first artificial lifeform is likely to be a simple man-made bacterium that proves that the technology can work.

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Vast Oceans Lay Beneath Surface Of The Earth

From The Telegraph:

Vast oceans may lay beneath the Earth's surface, new research suggests.

Scientists believe areas of enhanced electrical conductivity in the mantle - the thick region between the Earth's crust and its core - betray the presence of water.

Water divining researchers produced a global three-dimensional map of the mantle showing the areas through which electricity flowed most freely.

Conductivity hot spots were found to coincide with subduction zones, sites where the tectonic plates that divide up the Earth's surface are being forced downwards.

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Scientists Develop Intelligent Coffee Mug

From Spiegel Online:

Materials to keep drinks cold or hot for longer have been around for quite a while. Now a pair of German scientists has come up with a high-tech mug they claim keeps coffee at the perfect temperature.

The idea came to the researchers at the Christmas market in the Bavarian town of Rosenhiem. "We got upset because the mulled wine" -- Glühwein, in German -- "was always either too hot or too cold," say Klaus Sedlbauer, the head of the Fraunhofer Institute for Building Physics (IBP), and his colleague Herbert Sinnesbichler. "We had to find a solution."

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Why Is Human Mars Exploration So Surprisingly Hard?

Mars as seen near opposition late August 2003, by the Hubble Space Telescope
Credit: NASA/STSci/Hubble; Captioning credit MSSS/ ASU Themis/ NASA/ JPL

From The Space Review:

As space policy experts mull over alternative strategies for astronaut exploration of the solar system, possibly including human flight to Mars, the recently-concluded fortieth anniversary celebrations of the Apollo 11 moon landing inspire one specific question: what’s taken so long?

In the heady days of the Apollo triumphs, even the “pessimistic” forecasts imagined it might take as long as twenty years to get astronauts to Mars. Optimistic schedules put the first footsteps on the Red Planet—another “giant leap for mankind”—as early as 1982.

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Echoes Of The Birth Of The Universe: New Limits On Big Bang's Gravitational Waves

Aerial view of LIGO facility in Livingston, Louisiana.
(Credit: LIGO, California Institute of Technology.)

From Science Daily:

ScienceDaily (Aug. 20, 2009) — An investigation by the LIGO (Laser Interferometer Gravitational-Wave Observatory) Scientific Collaboration and the Virgo Collaboration has significantly advanced our understanding the early evolution of the universe.

Analysis of data taken over a two-year period, from 2005 to 2007, has set the most stringent limits yet on the amount of gravitational waves that could have come from the Big Bang in the gravitational wave frequency band where LIGO can observe. In doing so, the gravitational-wave scientists have put new constraints on the details of how the universe looked in its earliest moments.

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Astronauts Eye Hurricane Bill

The spiral bands of Hurricane Bill in the Atlantic Ocean fill the view as Expedition 20 crew members on the International Space Station look east-southeastward along the horizon. This view was taken on Aug. 18, 2009 at 16:08:54 GMT with a Nikkor 28-70mm zoom lens at the 40mm lens setting. At the time this photograph was taken, Hurricane Bill was centered at 15.9 degrees north latitude and 51.2 degrees west longitude, the winds were 90 knots (103.7 miles per hour) gusting to 110 knots (126.7 mph) and it was moving west-northwest (285 degrees) at 14 knots (16.1 mph). Credit: NASA

From Live Science:

From space, fury is beauty.

The spiral bands of Hurricane Bill in the Atlantic Ocean fill the view of a new image by Expedition 20 crew members on the International Space Station.

The picture looks east-southeastward along the horizon.

It was taken on Aug. 18, 2009 when the storm was centered at 15.9 degrees north latitude and 51.2 degrees west longitude.

Bill is expected to stay offshore as it curves north and then eastward along the eastern coast of North America, according to the latest update from the National Hurricane Center. The route is a typical one for hurricanes.

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Giant Robotic Cages to Roam Seas as Future Fish Farms?

A worker cleans an Aquapod fish cage off Peurto Rico in an undated photo. Another Aquapod has been outfitted with remote-control propellers. Someday such automated cages could herald an entirely new form of fish farming, with robotic cages roaming the seas, mimicking the movements of wild schools. Photograph courtesy Ocean Farm Technologies

From National Geographic:

In the future, giant, autonomous fish farms may whir through the open ocean, mimicking the movements of wild schools or even allowing fish to forage "free range" before capturing them once again. Already scientists have constructed working remote control cages.

Such motorized cages could help produce greener, healthier, and more numerous fish, just when we need them most.

The world's growing population is devouring seafood as quickly as it can be caught and has seriously depleted the world's wild fish stocks, experts warn.

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Worldwide Battle Rages For Control Of The Internet

From New Scientist:

WHEN thousands of protestors took to the streets in Iran following this year's disputed presidential election, Twitter messages sent by activists let the world know about the brutal policing that followed. A few months earlier, campaigners in Moldova used Facebook to organise protests against the country's communist government, and elsewhere too the internet is playing an increasing role in political dissent.

Now governments are trying to regain control. By reinforcing their efforts to monitor activity online, they hope to deprive dissenters of information and the ability to communicate.

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Entertainment Weekly To Embed Video Ad In Print Magazine

From Popular Science:

Last year Esquire rolled out an e-ink cover to celebrate the mag's 75 anniversary and introduced moving pictures (well, scrolling text and flashing images, at least) to the world of print. Next up: talkies. Yesterday, CBS and Time Inc. announced a video ad set to appear in the September 18 issue of Entertainment Weekly.

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Average Video Gamer Is 35, Fat And Depressed

The average video gamer: Players are typically 35, overweight and suffering from depression, and rely more on the internet for social support (file pic)

From The Daily Mail:

Playing video games is often regarded as a pastime for children and teenagers.

But the average age of players is now 35 - and it seems they have similar problems to their younger counterparts, according to researchers.

Adults who spend hours in front of a games console every day are more likely to be fat and depressed than those who don't, a U.S. study found.

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Google Book Project Gains Three Major Tech Opponents

From L.A. Times:

Microsoft, Yahoo and Amazon have signed on to a coalition that opposes the search giant's proposed settlement with the Authors Guild and the Assn. of American Publishers.

Three powerful technology companies have banded together to oppose Google Inc.'s proposed settlement with the Authors Guild and the Assn. of American Publishers over the Internet search giant's book scanning project.

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Who Said Anything About Landing? The Unmanned Surveillance Plane That Can fly For Five Years Non-Stop

Shape-shifter: The Z-wing configuration allows the
aircraft to absorb solar power when in sunlight

From The Daily Mail:

It might look like alien technology but this aircraft is no UFO. It's an Odysseus solar-powered aircraft that aims to be able to stay in the air for over five years continuously.

It has a Z-wing configuration that spans almost 500ft (150 metres) so that the aircraft's shape can be adjusted when in sunlight to absorb as much solar power as possible.

Then when it is in darkness, it flies flat in a straight line for aerodynamic efficiency with the energy collected stored in onboard batteries used to drive the aircraft's electric motors.

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NASA Panel Faces The Facts, And Asteroids

From Wired Science:

The 60s are over and no amount of artists’ renderings are going to bring back the Apollo days if NASA’s budget doesn’t get a big boost.

That’s the key message from the independent panel chartered to rethink NASA’s future. The Review of Human Space Flight Plans group also is looking at a variety of imaginative approaches to space exploration that could make NASA’s future seem less like reheated Apollo leftovers.

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Why We Lie So Much

Photodisc / Getty

From Time Magazine:

A professor of psychology at the University of Massachusetts, Robert Feldman has spent most of his career studying the role deception plays in human relationships. His most recent book, The Liar in Your Life: How Lies Work and What They Tell Us About Ourselves, lays out in stark terms just how prevalent lying has become. He talked to TIME about why we all need a dose of honesty.

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