Why it pays to be choosy
Biology /
Jan 09, 2008 |
4 / 5 (15) |
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Cooperative behaviour is common in many species, including humans. Given that cooperative individuals can often be exploited, it is not immediately clear why such behaviour has evolved.
Proton-powered pooping
Biology /
Jan 09, 2008 |
4.5 / 5 (13) |
0
Muscles usually contract when a neurotransmitter molecule is released from nerve cells onto muscle cells. But University of Utah scientists discovered that bare subatomic protons can act like larger, more ...
Hypnosis study reveals brain's 'amnesia centers'
Jan 09, 2008 |
3.9 / 5 (14) |
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Brain scans of hypnotized people that are taken as they forget and are triggered to remember have revealed neural circuitry that is key to the memory suppression and recall process. The researchers who conducted the study ...
New X-ray source in nearby galaxy spawns mystery
Jan 09, 2008 |
4.3 / 5 (12) |
1
Astronomers studying a nearby galaxy have spied a rare type of star system -- one that contains a black hole that suddenly began glowing brightly with X-rays.
Hidden Population of Powerful Black Holes Revealed in Large Sky Survey
Jan 09, 2008 |
4.3 / 5 (12) |
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A team of Sloan Digital Sky Survey (SDSS-II) scientists, led by Princeton University's Reinabelle Reyes and including astronomers at Penn State, has identified a large number of "hidden quasars" -- supermassive black holes ...
Alaska researcher changes asteroid orbit
Space & Earth / Space Exploration
Jan 09, 2008 |
4.5 / 5 (11) |
0
An astrophysicist at the University of Alaska uncovered the information that narrowed the odds of an asteroid hitting Mars.
Evolution of the Sexes: What a Fungus Can Tell Us
Biology /
Jan 09, 2008 |
4.1 / 5 (11) |
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Fungi don't exactly come in boy and girl varieties, but they do have sex differences. In fact, a new finding from Duke University Medical Center shows that some of the earliest evolved forms of fungus contain clues to how ...
Two unusual older stars giving birth to second wave of planets
Jan 09, 2008 |
4.6 / 5 (9) |
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Hundreds of millions — or even billions — of years after planets would have initially formed around two unusual stars, a second wave of planetesimal and planet formation appears to be taking place, UCLA astronomers ...
Small RNAs can prevent spread of breast cancer
Jan 09, 2008 |
4.8 / 5 (8) |
0
Howard Hughes Medical Institute researchers have identified small pieces of ribonucleic acid (RNA) that suppress the spread of breast cancer to the lungs and bone. The new research shows that the most invasive and aggressive ...
Methadone even at therapeutic levels can kill
Medicine & Health / Medications
Jan 09, 2008 |
3.9 / 5 (9) |
0
Methadone is a possible cause of sudden cardiac death even when it isn’t overdosed but is taken at therapeutic levels primarily for relief of chronic pain or drug addiction withdrawal, a new study by Oregon Health & Science ...
Exercising judgment: The psychology of fitness
Medicine & Health / Psychology & Psychiatry
Jan 09, 2008 |
4.7 / 5 (7) |
0
It’s only been a few weeks since you made that New Year’s resolution to exercise more, but already you’re finding reasons to skip days — maybe even weeks.
Staying active and drinking moderately is the key to a long life
Jan 09, 2008 |
4.1 / 5 (7) |
0
People who drink moderate amounts of alcohol and are physically active have a lower risk of death from heart disease and other causes than people who don’t drink at all, according to new research. People who neither drink ...
Researchers alarmed by levels of mercury and arsenic in Chinese freshwater ecosystem
Jan 09, 2008 |
4 / 5 (6) |
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A team of researchers, led by biologists at Dartmouth, has found potentially dangerous levels of mercury and arsenic in Lake Baiyangdian, the largest lake in the North China Plain and a source of both food and drinking water ...
Researchers find key to stopping cancer in its tracks
Jan 09, 2008 |
4.6 / 5 (5) |
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University of Manchester researchers have discovered a key process that may be involved in the spread of cancer by studying the growth of human embryonic stem (ES) cells.
Disrupting common parasites' ability to 'talk' to each other reduces infection
Biology /
Jan 09, 2008 |
4.8 / 5 (4) |
0
One of the most common human parasites, Toxoplasma gondii, uses a hormone lifted from the plant world to decide when to increase its numbers and when to remain dormant, researchers at Washington University School of Medicine ...
