- Digging for answers: Gender inequality in archeology?
- Spiraling Light, Nanoparticles and Insights Into Life’s Structure
- Unique sense of 'touch' gives a prolific bacterium its ability to infect anything
- Environmental bleaching impairs long-term coral reproduction
- Boosts in productivity of corn and other crops modify Northern Hemisphere carbon dioxide cycle
- New view of mouse genome finds many similarities, striking differences with human genome
- 'Green Revolution' changes breathing of the biosphere: Stronger seasonal oscillations in carbon dioxide linked to intensive agriculture
- Natural Gut Viruses Join Bacterial Cousins in Maintaining Health and Fighting Infections
- 'Aquatic osteoporosis' jellifying lakes
- Geologists shed light on formation of Alaska Range
- Prehistoric landslide discovery rivals largest known on surface of Earth
- Biochemists build largest synthetic molecular 'cage' ever
- 'Fountain of youth' underlies Antarctic mountains: Why peaks buried in ice look so young
- Seed dormancy, a property that prevents germination, already existed 360 million years ago
- A 3-D, talking map for the blind (and everyone else)
- Ancient genetic program employed in more than just fins and limbs: Hox genes provide blueprint for a diversity of body plan features
- Scientists get to the heart of fool's gold as a solar material
- Ancient New Zealand 'dawn whale' identified
Posted: 19 Nov 2014 02:50 PM PST
Posted: 19 Nov 2014 02:48 PM PST
Posted: 19 Nov 2014 12:17 PM PST
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Posted: 19 Nov 2014 11:22 AM PST
In the Northern Hemisphere, there's a strong seasonal cycle of vegetation. Each year in the Northern Hemisphere, levels of atmospheric carbon dioxide drop in the summer as plants "inhale," then climb again as they exhale after the growing season. During the last 50 years, the size of this seasonal swing has increased by as much as half, for reasons that aren't fully understood. Now a team of researchers has shown that agricultural production may generate up to a quarter of the increase in this seasonal carbon cycle, with corn playing a leading role.
Posted: 19 Nov 2014 10:27 AM PST
Looking across the genomes of humans and mice, scientists have found that, in general, the systems that are used to control gene activity in both species have many similarities, along with crucial differences. The results may offer insights into gene regulation and other systems important to mammalian biology, and provide new information to determine when the mouse is an appropriate model to study human biology and disease. They may also help explain its limitations.
Posted: 19 Nov 2014 10:26 AM PST
The intense farming practices of the 'Green Revolution' are powerful enough to alter Earth's atmosphere at an ever-increasing rate, boosting the seasonal amplitude in atmospheric carbon dioxide to about 15 percent over the past five decades. That's the key finding of a new atmospheric model, which estimates that on average, the amplitude of the seasonal oscillation of carbon dioxide in the atmosphere is increasing at a rate of 0.3 percent every year.
Posted: 19 Nov 2014 10:24 AM PST
Posted: 19 Nov 2014 09:54 AM PST
A plague of "aquatic osteoporosis" is spreading throughout many North American soft-water lakes due to declining calcium levels in the water and hindering the survival of some organisms. The reduced calcium availability is hindering the survival of aquatic organisms with high calcium requirements and promoting the growth of nutrient-poor, jelly-clad animals.
Posted: 19 Nov 2014 09:54 AM PST
Geologists have recently figured out what has caused the Alaska Range to form the way it has and why the range boasts such an enigmatic topographic signature. The narrow mountain range is home to some of the world's most dramatic topography, including 20,320-foot Mount McKinley, North America's highest mountain.
Posted: 19 Nov 2014 08:28 AM PST
A catastrophic landslide that rivals in size the largest known gravity slide on the surface of the Earth has been mapped in southwestern Utah by geologists. The Markagunt gravity slide, the size of three Ohio counties, covered at least 1,300 square miles and its full scope is still being mapped. It could prove to be larger than the Heart Mountain slide, the largest known on the Earth's surface.
Posted: 19 Nov 2014 07:20 AM PST
Biochemists have created the largest protein ever that self-assembles into a molecular cage. Their designed protein, which does not exist in nature, is hundreds of times smaller than a human cell. The research could lead to 'synthetic vaccines' that protect people from the flu, HIV and perhaps other diseases. It could also lead to new methods of delivering pharmaceuticals inside of cells and the creation of new nano-scale materials.
Posted: 19 Nov 2014 07:20 AM PST
Posted: 19 Nov 2014 07:19 AM PST
Posted: 19 Nov 2014 07:16 AM PST
Posted: 19 Nov 2014 05:49 AM PST
Researchers have found that the Hox gene program, responsible for directing the development of fins and limbs, is also utilized to develop other body part features of vertebrates, such as barbels and vents in fish. The research indicates that this genetic program, which dates back at least 440-480 million years, is older and more widely utilized than previously thought.
Posted: 18 Nov 2014 03:25 PM PST
As the installation of photovoltaic solar cells continues to accelerate, scientists are looking for inexpensive materials beyond the traditional silicon that can efficiently convert sunlight into electricity. Theoretically, iron pyrite could do the job, but when it works at all, the conversion efficiency remains frustratingly low. Now, a research team explains why that is, in a discovery that suggests how improvements in this promising material could lead to inexpensive yet efficient solar cells.
Posted: 18 Nov 2014 03:24 PM PST
Palaeontologists are rewriting the history of New Zealand's ancient whales by describing a previously unknown genus of fossil baleen whales and two species within it. The two whales, which lived between 27-25 million years ago, were preserved in a rock formation near Duntroon in North Otago. At that time the continent of Zealandia was largely or completely under water and the whales were deposited on a continental shelf that was perhaps between 50 to 100 meters deep.
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