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Posted in Science on Jan 10th, 2010
The grooming behavior displayed by primates is due to less rational behavior than often thought. According to a computer model, one basic rule explains all possible grooming patterns: individuals will groom others if they’re afraid they’ll lose from them in a fight.
Posted in Science on Jan 9th, 2010
The complete asexuality of a widespread fungus-gardening ant, the only ant species in the world known to have dispensed with males entirely, has recently been confirmed.
Posted in Science on Jan 8th, 2010
Fossils may provide tantalizing clues to human history but they also lack some vital information, such as revealing which pieces of human DNA have been favored by evolution because they confer beneficial traits — resistance to infection or the ability to digest milk, for example. Now, researchers describe a method for pinpointing these preferred regions [...]
Posted in Science on Jan 7th, 2010
The magnetic field in the center of the Milky Way is at least 10 times stronger than the rest of the galaxy, according to new research.
Posted in Science on Jan 6th, 2010
Girls around the world are not worse at math than boys, even though boys are more confident in their math abilities, and girls from countries where gender equity is more prevalent are more likely to perform better on mathematics assessment tests, according to a new analysis of international research.
Posted in Science on Jan 5th, 2010
Many US adults with major depression do not receive treatment for depression or therapy based on treatment guidelines, and some racial and ethnic groups have even lower rates of adequate depression care, according to a new study.
Posted in Science on Jan 4th, 2010
Spontaneous brain activity formerly thought to be “white noise” measurably changes after a person learns a new task, researchers have shown. Scientists also report that the degree of change reflects how well subjects have learned to perform the task.
Posted in Science on Jan 3rd, 2010
Mutations are the raw material of evolution. Scientists have now been able to measure for the first time directly the speed with which new mutations occur in plants. Their findings shed new light on a fundamental evolutionary process. They explain, for example, why resistance to herbicides can appear within just a few years.
Posted in Science on Jan 2nd, 2010
Several decades ago scientists discovered that the Moon, long thought to have no atmosphere, actually does have an extremely thin exosphere. Scientists generally believe that the ions that make up the lunar exosphere are generated at the Moon’s surface by interaction with solar photons, plasma in the Earth’s magnetosphere, or micrometeorites. However, scientists have been [...]
Posted in Science on Jan 1st, 2010
In the 1940s Swiss glaciers were melting at an even-faster pace than at present, according to new research. This is despite the fact that the temperatures in the 20th century were lower than in this century. Researchers see the main reason for this as the lower level of aerosol pollution in the atmosphere.
Posted in Science on Dec 31st, 2009
Scientists are developing a way to control the Casimir force, a quantum mechanical force that attracts objects when they are only hundred nanometers apart.
Posted in Science on Dec 30th, 2009
An ultra-high-resolution imaging technique using X-ray diffraction is a step closer to fulfilling its promise as a window on nanometer-scale structures in biological samples. Researchers report progress in applying an approach to “lensless” X-ray microscopy that they introduced one year ago, with the potential to yield insights for evolutionary biology and biotechnology. They have produced [...]
Posted in Science on Dec 29th, 2009
Scientists have gained new insights into the timing of molar emergence and its relation to growth and reproduction in apes. “We can use the same techniques to calculate ages at first molar emergence from the fossils of early hominids that just happened to die while their first molars were erupting,” researchers report.
Posted in Science on Dec 28th, 2009
New research in mice suggest that ghrelin might also work in the brain to make some people keep eating “pleasurable” foods when they’re already full.
Posted in Science on Dec 27th, 2009
For as many as 1 in 20 people, everyday experiences can elicit extra-ordinary associated sensations. The condition is known as synesthesia and the most common form involves “seeing” colors when reading words and numbers.
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