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The cosmic web unveiled: observing ‘dim matter’ in 3D

May 1, 2014


Caltech astronomers have taken unprecedented 3D images of the intergalactic medium (IGM) — the diffuse gas that connects galaxies throughout the universe, proving that the speculated “dim matter” of the universe exists.

Theoreticians have predicted since the 1980s that primordial gas from the Big Bang is not spread uniformly throughout space, but is instead distributed in channels that span galaxies and flow between them. This “cosmic web” —… read more

The cosmological supercomputer

How the Bolshoi simulation evolves the universe all over again
October 3, 2012


Most of the ordinary matter in the universe — the stuff that makes up all the atoms, stars, and galaxies astronomers can see — is invisible, either sprinkled throughout intergalactic space in tenuous forms that emit and absorb little light or else swaddled inside galaxies in murky clouds of dust and gas, Joel R. Primack writes in IEEE Spectrum.

When astronomers look out into the night… read more

The cost of bin Laden: $3 trillion over 15 years

May 17, 2011

By conservative estimates, bin Laden cost the United States at least $3 trillion over the past 15 years, counting the disruptions he wrought on the domestic economy, the wars and heightened security triggered by the terrorist attacks he engineered, and the direct efforts to hunt him down.

Certainly, in the course of the fight against bin Laden, the United States escaped another truly catastrophic attack on our soil. Al-Qaida,… read more

The Creativity Crisis

July 12, 2010

American creativity scores have been falling since 1990, College of William & Mary researchers have discovered.

One likely culprit is the number of hours kids now spend in front of the TV and playing videogames rather than engaging in creative activities. Another is the lack of creativity development in our schools.

Meanwhile, other countries — in Europe and China especially — are making creativity development a national priority.… read more

The Crowd Is Wise (When It’s Focused)

July 20, 2009

Open-innovation models succeed only when carefully designed for a particular task and when the incentives are tailored to attract the most effective collaborators, say collective-intelligence experts.

The cultural genome: Google Books reveals traces of fame, censorship and changing languages

December 20, 2010


Harvard University researchers have been analyzing the more than 15 million books scanned by Google, which created a massive electronic library that represents 12% of all the books ever published.

As the team says, the corpus “will furnish a great cache of bones from which to reconstruct the skeleton of a new science.”

There are strong parallels to the completion of the human genome. Just as that… read more

The cyberweapon that could take down the Internet

February 14, 2011

A new cyberweapon could take down the entire Internet — and there’s not much that current defenses can do to stop it, says Max Schuchard at the University of Minnesota in Minneapolis and colleagues,

The attack would pit the structure of the Internet against itself. The attack requires a large botnet — a network of computers infected with software that allows them to be externally controlled: Schuchard… read more

The cyborg in us all

September 19, 2011

Electrocorticographic (ECoG) implant (credit: Albany Medical College)

Gerwin Schalk studies Albany Medical Center patients who have become some of the world’s first cyborgs, with brain implants. Schalk transforms the brain signals emitted by their thoughts into software commands.

He is, in effect, designing a button that the mind could push. He dreams of letting people speak with their neurons, issuing silent commands to their machines. The project is part of a $6.3 million Army initiative to invent… read more

The dangers of a high-information diet

January 15, 2010

Does the recent explosion in available information, primarily thanks to the Internet, bring dangers we have not anticipated? Nick Bostrom, director of the Future of Humanity Institute at the University of Oxford, fears that it might.

(World Bank)

The dangers of ‘e-personality’

March 11, 2011

Excessive use of the Internet, cell phones, and other technologies can cause us to become more impatient, impulsive, forgetful and narcissistic according to a new book on “e-personality,” says psychiatrist Elias Aboujaoude, MD, clinical associate professor of psychiatry and behavioral sciences and director of Stanford University’s impulse control and obsessive-compulsive disorder clinics, in a new book, Virtually You: The Dangerous Powers of the E-Personality.

Drawing from his… read more

The dark side of animation

June 12, 2009

Custom animation in PowerPoint lectures negatively impacts student learning, University of North Carolina researchers have found.

Animated slides meant to present information incrementally actually require greater concentration, which makes it harder to remember content as well as reducing overall exposure time to the “complete” slide, the researchers found.

The dark side of working nights

April 13, 2012


Working the graveyard shift can increase the risk of developing diabetes via two separate mechanisms, according to a Harvard Medical School study,

The double whammy of sleep deprivation and a sleep/wake schedule that’s out of sync with the body’s internal biological clock reduces the amount of insulin secreted by the pancreas as well as the insulin sensitivity of various organs and tissues, the study found.


A… read more

The Darwinian Interlude

February 3, 2005

The Darwinian era is over — cultural evolution has replaced biological evolution as the driving force of change, says Freeman Dyson, professor emeritus of physics at the Institute for Advanced Study.

“Cultures spread by horizontal transfer of ideas more than by genetic inheritance. Cultural evolution is running a thousand times faster than Darwinian evolution, taking us into a new era of cultural interdependence that we call globalization.

“And… read more

The Data-Driven Life

May 3, 2010

“Almost imperceptibly, numbers are infiltrating the last redoubts of the personal,” observes writer Gary Wolf.

“Sleep, exercise, sex, food, mood, location, alertness, productivity, even spiritual well-being are being tracked and measured, shared and displayed.

“First, electronic sensors got smaller and better. Second, people started carrying powerful computing devices, typically disguised as mobile phones. Third, social media made it seem normal to share everything. And fourth, we began to… read more

The Deadly Art of Viral Cinema

August 3, 2005

Harvard biophysicist Xiaowei Zhuang uses lasers, a microscope, and pair of hi-res digicams to capture viral infection in action.

These movies are crucial to scientists searching for opportunities to block viruses in transit. Equally important, researchers may learn from Zhuang’s films how to mimic viruses, which could help them engineer drugs that penetrate cells and treat genetic disorders from within.

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