Justin Dernier/European Pressphoto Agency
The spacecraft Juno at Cape Canaveral on Thursday. It will make a five-year voyage to Jupiter and then orbit it for a year.
Sixteen years after the spacecraft Galileo explored Jupiter, NASA is preparing to send another craft, Juno, back.
Scientists Find Signs Water Is Flowing on Mars
By KENNETH CHANG
Shifting dark streaks on the surface of Mars are signs that water is flowing there today, scientists said Thursday.
OBSERVATORY
Rare Mutation Causes Lack of Fingerprints
By SINDYA N. BHANOO
An Israeli doctor led a study of a Swiss family, half of whose members have a rare condition called adermatoglyphia.
OBSERVATORY
Heat-Sensing Nose Helps the Vampire Bat Find Its Meals
By SINDYA N. BHANOO
The bats, which need a meal of blood every day or two, use their noses to detect heat where blood in their prey is close to the surface.
DRILLING DOWN
A Tainted Water Well, and Concern There May Be More
By IAN URBINA
Industry executives as well as regulators have said that fracking has never contaminated underground drinking water. But there is at least one documented case.
Documents: A Case of Fracking-Related Contamination
Graphic: Contamination From DrillingSCIENTIST AT WORK BLOG
Digging Around for Snails
By AMANDA SCHMIDT
In order to date landslide deposits in Sichuan, China, scientists look for bones, charcoal and fossil snails.
Science Times: Aug. 2, 2011
Ambitions as Deep as Their Pockets
By WILLIAM J. BROAD
John M. Heller/Getty Images
DOWN, DOWN, DOWN Richard Branson, the Virgin Atlantic founder, is planning his craft's first deep dive this year.
A group of rich daredevils, including James Cameron, Richard Branson and Eric E. Schmidt, are investing in submersibles to explore the ocean’s deepest spot.
REMARKABLE CREATURES
Call of the Thylacine: Protect the Wild
By SEAN B. CARROLL
In an Australian journey, a painting of an extinct marsupial was a reminder of how fragile species are.
Video: The Search for the ThylacineNEWS ANALYSIS
Particle Accelerators Full of Spin and Fury, Signifying Something
By DENNIS OVERBYE
Trying to keep up with particle physics after a year of rumors and hints of what could be big discoveries is difficult unless you have a scorecard.
Birdlike Dinosaur Fossil May Shake Up the Avian Family Tree
By JOHN NOBLE WILFORD
A Chinese fossil representing a previously unknown species of birdlike dinosaur could represent the final straw in the theory that Archaeopteryx was the earliest bird.
Sign of Advancing Society? An Organized War Effort
By NICHOLAS WADE
Organized hostilities between chiefdoms required that people subordinate individual self-interest to that of the group.
Health News
New H.I.V. Cases Steady Despite Better Treatment
By DONALD G. McNEIL Jr.
The number of new infections has remained around 50,000 a year for a decade in the United States, but the epidemic is growing rapidly worse among young gay black men.
ESSAY
Who Falls to Addiction, and Who Is Unscathed?
By RICHARD A. FRIEDMAN, M.D.
Genes, environment and psychology affect who uses drugs uneventfully and who is undone by them.
More Multimedia
VIDEO: Life Out There: Eden in a Test Tube
To better recognize extraterrestrial life should they come upon it, scientists are working to create simple life forms in a lab. But, as Dennis Overbye reports, they first have to agree what life is.
INTERACTIVE GRAPHIC: 30 Years of the Space Shuttle
An interactive timeline of the 135 space shuttle missions.
Slide Show: Final Launching of Atlantis
VIDEO: Nora Volkow
An interview with the neuroscientist in charge of the National Institute on Drug Abuse, who also happens to be the great-granddaughter of Leon Trotsky.
Rock-Paper-Scissors: You vs. the Computer
Test your strategy against the computer in this rock-paper-scissors game illustrating basic artificial intelligence.
‘Family Guy’ Creator Part of ‘Cosmos’ Update
By DAVE ITZKOFF
Fox’s new version of “Cosmos,” the 1980 mini-series from Carl Sagan, will have Seth MacFarlane as a producer and revisit Sagan’s explorations of existence at its most massive and microscopic.
From the Book Review
‘The Theory That Would Not Die’
By SHARON BERTSCH McGRAYNE
Reviewed by JOHN ALLEN PAULOS
The controversial history of the mathematical theorem that tells us when we should change our minds.
River Sand in Bedrock
August 4, 2011
Kelly Lake and Planetary Exploration
August 3, 2011
Living Dangerously in Sichuan Province
August 2, 2011
Reddy Kilowatt Works Up a Sweat
August 5, 2011
Hudson Valley Lures Green City Folk
August 5, 2011
As Humans Draw Nearer, Leopards Attack in India
August 5, 2011
Science Columns
Q & A
The Pink and the Blue
By C. CLAIBORNE RAY
The plant’s color is determined by the aluminum it does or does not absorb through its roots.
OBSERVATORY
Tracing Social Networks of the Asian Elephant
By SINDYA N. BHANOO
New research shows that while Asian elephants may change their day-to-day associations, they maintain a larger, stable network from which they pick their companions.
OBSERVATORY
A Vine’s Acoustics Send a Bat Signal
By SINDYA N. BHANOO
The plant, Marcgravia evenia, has dish-shaped leaves that reflect sounds especially well, making it easy for bats to identify it though echolocation.
OBSERVATORY
Nibblers Affect Climate Tales That Tree Rings Tell
By SINDYA N. BHANOO
Analyzing past climate conditions using tree rings is complicated when the trees have been food for animals, researchers have found.
Podcast: Science Times
This week: A race to the bottom of the ocean, an extinct marsupial comes to life and the psychology of addiction.
Health Columns
PERSONAL HEALTH
Ancient Moves for Orthopedic Problems
By JANE E. BRODY
It pays to know about methods of prevention and treatment for orthopedic problems that are low-cost and rely almost entirely on self-care.
REALLY?
The Claim: A Normal Heart Rate Is 60 to 100 Beats a Minute
By ANAHAD O'CONNOR
Some researchers believe that an increased risk of stroke and heart disease at the upper end of that range may mean it's time to re-examine what's considered normal.
No hay comentarios:
Publicar un comentario