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Showing stories 251-275 out of 570 stories.
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10-Sep-2009
Constant climate change in the Arctic
The region of Earth surrounding the North Pole is known as the Arctic, and researchers say that rapid climate change is disturbing the ecosystems there at a very rapid pace. Across all kinds of ecosystems in the Arctic -- on land, in fresh water, and in salt water -- life is changing dramatically.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

3-Sep-2009
A very recent break from a long, cool trend
About 2,000 years ago, researchers say that the Arctic began cooling off -- and that cooling trend lasted all the way up to the 20th century. But, recently, the pattern of cooling in the Arctic has reversed, they say.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

27-Aug-2009
Dog coats shed genetic secrets
The differences between the silky curls of a cocker spaniel and the shaggy mop of a sheepdog are the result of a mere three genes, researchers report in a new study.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

20-Aug-2009
Bombs away! A deep sea worm's defense
Researchers have discovered several new species of deep-sea worms that let loose tiny balloon-like structures, which start to glow a brilliant green as soon as they detach from the worms' bodies.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

13-Aug-2009
Following the leader -- to friendship
For years, researchers have associated imitation among human beings -- copying another's actions -- with positive social behavior, like cooperation and friendship. Imitating others' actions is a way to connect with them, and to communicate our likeness to or affection for that person. Now, researchers have found that capuchin monkeys, a highly social species of monkey, often repay imitation with friendship as well.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

6-Aug-2009
DNA does yoga
Researchers have figured out how to make DNA bend and twist into a variety of new shapes. These curvy new molecules could someday be used to build nanoscale devices -- smaller than the width of a human hair -- for delivering drugs inside the body, growing new tissues or studying single proteins.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

30-Jul-2009
Native oysters, back in the Chesapeake
After many years of effort, a team of researchers has finally been able to restore native oysters to their home in the Chesapeake Bay, Va.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

23-Jul-2009
Who can figure out the toucan? You can!
The toco toucan's bill occupies a special place in the hall of animal oddities. Making up about one-third of the bird's total body length, it's the largest bill of any bird, compared to its owner's body size. Scientists have puzzled for centuries over the bill's possible purpose. Might be used for attracting mates? Maybe for manipulating fruit?

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

16-Jul-2009
Moths use sonar to foil bat attacks
Researchers have found that a particular species of tiger moth is able to escape from attacking bats by jamming their sonar with sudden bursts of the moths' own ultrasound. This new discovery adds to the long list of defense mechanisms that insects use against bats.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

9-Jul-2009
How the turtle got its shell
In their earliest stages as embryos, turtles, chickens, mice, and even humans all look pretty much the same -- big head, tiny arms, long spine that looks like a tail. By the time they hatch, however, turtles have taken a major detour and developed shells on their backs.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

2-Jul-2009
Exploring the layer of ice at Mars' north pole
NASA's Phoenix mission landed on the planet Mars in May 2008, and explored the surface of the Red Planet for more than five months. New data from the Phoenix Mars Lander confirms that there is a layer of ice water at the Martian north pole -- about five to 18 centimeters beneath the soil.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

29-Jun-2009
AAAS: 10 science books to help your kids avoid summer brain drain
In time for summer vacation, the American Association for the Advancement of Science has released a summer reading list of 10 science books for children ages 10-14, or grades 4-8. The books include stories on bioluminescent creatures, excavations from colonial-era settlements, and women who trained for space flight. Malcomson's list also includes activity books, such as a bird watching guide and a book containing tips on how to be "green".

Contact: Molly McElroy
mmcelroy@aaas.org
202-326-6434
American Association for the Advancement of Science

25-Jun-2009
Fish ears and ocean chemistry
In environments with high carbon dioxide levels, researchers say that the ear bones of young fish actually grow larger than normal -- rather than smaller, as they had expected. This finding means that ocean chemistry could have unexpected effects on the minerals produced by fish larvae.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

18-Jun-2009
Plant fossils shed light on extinction
Plant fossils from Greenland tell us that the number of plants there decreased abruptly about 200 million years ago, when the Triassic period ended and the Jurassic period began, researchers say in the latest issue of Science.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

11-Jun-2009
How whirlybird seeds catch air
Plants and flying animals have evolved the same aerodynamic trick for fighting gravity while flying, scientists have discovered.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

4-Jun-2009
Bird 'mobsters' learn from their neighbors
When a cuckoo comes along, hoping to sneak one of its own eggs into a reed warbler nest, the warblers mount an impassioned defense, mobbing the parasitic birds while making loud, raspy calls and snapping their beaks.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

28-May-2009
Undiscovered gas and oil in the Arctic Circle
Researchers say that the Arctic Circle probably contains a full 30 percent of the natural gas in the world that hasn't been discovered yet. They also predict that the Arctic Circle holds 13 percent of Earth's undiscovered oil.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

21-May-2009
An entire region of Mars, shaped by water
Long ago, the face of Mars was shaped by water flowing across its surface. But, researchers have never known exactly how these processes took place on the ancient Martian planet. NASA's Mars rover Opportunity has been exploring the Victoria crater, located near the equator of the red planet, for two years. Now, researchers have reviewed some of the data it has collected along the way, and they are sharing some rather exciting discoveries.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

14-May-2009
Longer seasons for many different reasons
Many complex relationships exist between Earth's seasonal cycles, the global climate, and the lives of individual species in nature. Changes made to one of these things usually means that the other two will change in some way as well. Now, some new research is highlighting just how much we still don't understand about these important and complex relationships.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

7-May-2009
Northern shrimp like it cold
Northern shrimp -- the small, sweet ones that you're likely to see in salad -- use temperature as a cue for egg-laying and may therefore be seriously vulnerable to climate change, scientists say in a new study.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

30-Apr-2009
The dangers of the global wildlife trade
Like any other product, animals are bought and sold on the global market. The trade of wildlife from one part of the world to another represents a serious money-making business, but some researchers also call it a serious threat.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

23-Apr-2009
Spiderman's silk secret revealed?
Adding small amounts of certain metals to spider silk makes the silk even more resistant to breaking, researchers report. In its natural form, spider silk is already tougher and lighter than steel, so that's a pretty impressive improvement.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

16-Apr-2009
Blood Falls: Life beneath a rusty glacier
At Blood Falls, on the East Antarctic Ice Sheet, rivers of red, iron-rich minerals spill out from the snout of the Taylor Glacier, dramatically staining the white ice.

Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

9-Apr-2009
A model to explain how animals fly
In order to control themselves, flying creatures need to use specialized movements, or maneuvers, to get from one place to another. For a long time, researchers have wondered exactly how they do it. Now, researcher Tyson Hedrick and colleagues have created a model of flight for small creatures (like insects) and large ones (like birds) to better explain how it's done.

Contact: SciPak
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

2-Apr-2009
Robots working in the laboratory
Could robots replace scientists in the laboratory one day? Some researchers seem to think so -- at least to some degree. After building a robot that designed and performed scientific experiments in a laboratory, Ross King and colleagues seem convinced that robots will work together with human scientists someday in the lab. But, they do not believe human scientists will be replaced entirely.

Contact: Scipak
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

Showing stories 251-275 out of 570 stories.
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Funding provided by the William T. Golden Endowment Fund for Program Innovation at AAAS.