jueves, 5 de mayo de 2011

ciencia


Intel's new transistors have tiny pillars, or fins, that rise above the chip's surface.
Intel's new transistors have tiny pillars, or fins, that rise above the chip's surface.
A new design uses a tiny fin that could make smaller, faster, lower-power chips.
An artist’s conception of Gravity Probe B orbiting Earth to measure space-time.

52 Years and $750 Million Prove Einstein Was Right

Data from a set of orbiting gyroscopes in the Gravity Probe B project has confirmed some of the weirdest predictions of Einstein’s general relativity theory, Stanford researchers announced.

Suit Accuses U.S. Government of Failing to Protect Earth for Generations Unborn

Most of the plaintiffs in the public trust lawsuit filed in San Francisco are teenagers.

A Bin Laden Hunter on Four Legs

The dog that accompanied the Navy Seal team that killed Osama bin Laden is the subject of intense speculation.
SKIN DEEP

New Stratagems in the Quest for Hair

Transplants, lotions, pills: what’s next in the search for a thick head of hair? Cloning, says one doctor.

Finding on Dialects Casts New Light on the Origins of the Japanese People

New research suggests that the Japanese language is not descended from that of the hunter-gatherers who first inhabited the islands some 30,000 years ago.

BP Is Fined $25 Million for ’06 Spills at Pipelines

A federal prosecutor said the penalty was a wake-up call as the Gulf of Mexico spill inquiry is being conducted.
Science Times: May 3, 2011
SPAIN Fire-walkers carry family members or friends as they cross the coals.
Dimitris Xygalatas
SPAIN Fire-walkers carry family members or friends as they cross the coals.
A study of fire-walking found that the heart rates of relatives were synchronized with those of the walker.


Serge Bloch
Researchers lately have learned that serotonin plays an impressive number of critical roles throughout the body.

Drumbeat of Nuclear Fallout Fear Doesn’t Resound With Experts

Experts say that the radiation uptick from fallout in Japan disappears as a cause of concern when the big picture is considered.
Health News
WELL

Adding Food and Subtracting Calories

Eating more foods like cayenne pepper and pureed vegetables can suppress appetite and lead to the consumption of fewer calories.
More Multimedia

SLIDE SHOW: A Shuttle Town’s Glory Days

The launching of the space shuttle Endeavor is expected to be one of the biggest ever, jamming the roads in Titusville, Cape Canaveral and other nearby Florida towns.

INTERACTIVE FEATURE: What Makes Music Expressive?

What makes music expressive? Quiz yourself based on new research.

SLIDE SHOW: Readers’ Photos: A Family’s Best Friend?

Photos and stories of pets that were viewed differently by family members.

INTERACTIVE FEATURE: Rock-Paper-Scissors: You vs. the Computer

Test your strategy against the computer in this rock-paper-scissors game illustrating basic artificial intelligence.
GREEN BLOG
Guess: fresh or frozen?

When 'Fresh' Fish is Really Frozen

Much of the tilapia farmed in China for export is frozen and then treated with carbon monoxide, a gas that prevents meat and seafood from discoloring as it ages; when it is thawed, it looks like new.
Science Columns
Q & A

Stand Up Straight!

Certain kinds of exercise may prevent or delay progression of abnormally hunched backs, but they have not been proved to correct the problem completely.
OBSERVATORY
The forked tongues of hummingbirds have tips lined with hairlike extensions called lamellae.

Forget Straws: Hummingbirds Sip With Forks

Forked tongues whose tips are lined with hairlike extensions help hummingbirds draw nectar, high-speed video reveals.
OBSERVATORY

If Big-Brained Birds Can Make It Here...

Birds with brains that were large in relation to their body size were more likely to succeed in cities, researchers say.
OBSERVATORY

An Antarctic Buffet Where Whales Gather to Feast

Scientists working in the western Antarctic have found the densest populations of whale and krill ever recorded.
OBSERVATORY
Monkeys can reproduce patterns of shapes on a computer screen.

Monkeys’ Memories Can Stretch Beyond What’s in Front of Them

A recall study of rhesus monkeys suggests that language is not necessary — either for having the ability to recall, or for proving it to an experimenter.
Podcast: Science Times
Science Times Podcast
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This week: The psychic wounds of torture, the firewalkers of Spain, and does exercise really calm you down?
Health Columns
PERSONAL HEALTH

A Thief That Robs the Brain of Language

Primary progressive aphasia is one of several forms of brain disease lost in the medical shadow of a much better known relative, Alzheimer’s disease.
REALLY?

The Claim: Having Tonsil Surgery Causes Weight Gain

No one really knows how to explain the connection, but studies do show a link between the surgery and weight gain.
Opinion
DOT EARTH BLOG

Shaping Human Path to 15, or 6, Billion by 2100

Varied views on population paths from now through 2100.

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