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Showing stories 101-125 out of 578 stories.
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11-Oct-2012
Black glass in new Martian meteorite
Last summer, a meteorite from Mars plunged into the Moroccan desert. A new study appearing in the Oct. 12 issue of in the journal Science shows that the rock was ejected from the surface of Mars 700,000 years ago.

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

4-Oct-2012
Some dinos' teeth rivaled mammals' for plant-chewing
The teeth of duck-billed dinosaurs called "hadrosaurids" were far more complex than those of other reptiles, according to a new study. In fact, they were much more like the teeth of horses, bison or elephants, which are built for grinding tough, gritty plant material, the researchers say.

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

27-Sep-2012
Vanishing electronic medical implants
Imagine a biomedical implant (designed to help treat surgical infections or stimulate bone growth, for example), disappearing into the body after it is no longer needed.

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

20-Sep-2012
What cheetahs and house cats have in common
The coats and color patterns of many domestic house cats are similar to those of wild cats, like tigers and cheetahs, suggesting that those traits are controlled by the same genes in different species. Now, a new study in Science shows that mutations in two specific genes can lead to the tabby patterns seen in domestic house cats as well as the spots on wild cheetahs.

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

13-Sep-2012
Why do mom killer whales live so long?
A new study may help explain why mother killer whales live so long after having children. Most animals must survive on their own once they reach adulthood, yet a new study published in the Sept. 14, 2012, issue of the journal Science shows that the presence of mother killer whales improves the survival of their adult sons, which in turn increases the number of grandchildren the adult sons produce.

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

6-Sep-2012
The pollution that grows at night
Nitrogen oxides -- you can call them "Nox" -- are one kind of pollution that comes from burning gasoline and other fuels. They're produced when we drive cars, when we heat our homes, and in many other ways. Scientists have shown that they are involved in chemical reactions in the Earth's atmosphere that are warming up our planet.

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

28-Aug-2012
2 stars and 2 planets?
Astronomers have known that, unlike Earth, some planets orbit two stars instead of just one. But now, data from NASA's Kepler spacecraft has revealed a planetary system that consists of two planets orbiting around two stars. The discovery shows that a pair of stars, or a binary star system, isn't limited to just one planet.

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

23-Aug-2012
The birthplace of English's first ancestor language
The language you're reading right now, English, is one of the Indo-European languages. These languages make up one of the largest language families in the world and are spoken by people as far apart as Iceland and Sri Lanka.

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

16-Aug-2012
Like an octopus, flexible robot can change colors
Researchers have developed a soft, flexible robot that can change colors to blend in or stand out in its environment. The robot is a rubbery, four-limbed machine, with many tiny channels running through it. It's tethered to a control system. Forcing air through the channels makes the machine "walk."

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

9-Aug-2012
Working with our waste
This week, a special issue of Science highlights the complicated issue of human waste. It's far from a glamorous subject, but waste is unavoidable. In fact, depending on one's lifestyle, each of us can generate tons of waste -- from table scraps and old newspapers to broken mp3 players and outdated computers -- over our lifetimes. And if you include all the waste from farms, mines, and industries, the total really begins to skyrocket.

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

2-Aug-2012
To fool other birds, cuckoos use multiple disguises
Social learning, or learning from the behavior of others, might play a larger role in animal mimicry -- or the art of disguise -- than researchers ever realized, according to a new study of common cuckoos.

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

26-Jul-2012
The bigger the horn, the better the mate
In the past, researchers have generally assumed that super-sized body parts -- like beetle horns, deer antlers, and extra-long bird tails -- were symbols of a male's fitness. Now, a new report has confirmed that these "exaggerated" traits are, in fact, honest signals of male quality. It also demonstrates how the growth of these super-sized body parts may be affected by nutrition and insulin signaling in the body.

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

19-Jul-2012
Plants turned on by oxygen levels?
Germ cells are the building blocks of reproductive cells, like sperm and eggs. And in humans, these germ cells are established during the early stages of development and then maintained until an individual is ready to have kids.

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

12-Jul-2012
There's still time to save species in the Amazon...
... but the clock's ticking, a new study shows. The Brazilian Amazon is the largest continuous forest on Earth, and it holds more than 40 percent of the world's tropical rainforest.

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

5-Jul-2012
What caused an ancient coral catastrophe?
Millions of tiny animals create ocean coral reefs when they create shells for themselves out of a cement-like ooze. These reefs are important because they provide a home for lots of different kinds of sea life. When the reefs get "sick" and the coral stop building, it can be a sign that something major has changed in the ocean.

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

28-Jun-2012
Unusual eyes help fish see in the murk
Elephantnose fish are long-snouted, freshwater fish that live in dim, murky environments. Unlike other animals that are adapted to the dark, these fish do have eyes and rely partly on their vision to find their way around.

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

21-Jun-2012
Lake in Siberia offers window to complex Arctic climate
Climate in the Arctic region of the planet is more complex than it is in other areas of the world, which has made it difficult for researchers to understand how climate really works there. Now, however, researchers have discovered a tool that gives them a glimpse of what Arctic climate may have been like over the past 2.8 million years.

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

14-Jun-2012
World's first cave paintings older than expected
A new study has found that some cave paintings in northwestern Spain are much older than researchers had expected, raising questions about who created them. According to Alistair Pike and colleagues, the tradition of decorating caves must have began in Europe more than 40,000 years ago -- an age that coincides with the arrival of modern humans.

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

7-Jun-2012
This shrimp has a hammer
The hammer-like claws of the peacock mantis shrimp can smash through mollusk shells, the heads of small fish, even a glass aquarium wall. The claws themselves stay surprisingly strong, even after being damaged while delivering so many blows.

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

31-May-2012
Opium poppies pave the way for a cancer-killing compound
The opium poppy plant, Papaver somniferum, is the source of certain illegal narcotics, like morphine and heroin. But, the plant also produces a non-addictive compound called noscapine that acts as both a cough suppressant and tumor-killing agent in humans.

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

24-May-2012
Climate change works for the brown argus butterfly
A pretty brown butterfly with orange spots on its wings, called the brown argus butterfly, is thriving in the United Kingdom for an interesting reason. Summers have become warmer in the last twenty years, and this change opens up new possibilities for where the butterfly can lay its eggs.

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

17-May-2012
Fragments of rocks that hit the moon
While looking at rocks collected on the moon during the Apollo mission, scientists have found tiny fragments of meteorites that hit the moon long ago.

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

10-May-2012
Earliest known Mayan astronomical calendar
A painted room in a Mayan temple in Guatemala shows numerical records of lunar and possibly planetary cycles, scientists report in a new study. The hieroglyphs are from the 9th century, making this calendar older than the records in the Mayan Codices, which were books written on bark paper a few centuries before Columbus landed.

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

3-May-2012
A different kind of cave treasure
What do you think the scientists who explored the amazing caves in these pictures were looking for? Bats? Skeletons? Pirate treasure? Actually, it was the stalagmites that they were after, because these spiky formations contain important chemical clues to ancient climate.

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

26-Apr-2012
Did fire or ice shape the valleys of Mars?
A particular region of Mars, known as the Athabasca Valles, can be identified by polygon-shaped patterns on the ground. This part of the planet is a network of valleys located near the equator of Mars, and for years astronomers have puzzled over what kind of processes shaped it.

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

Showing stories 101-125 out of 578 stories.
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Funding provided by the William T. Golden Endowment Fund for Program Innovation at AAAS.