ScienceDaily Environment Headlines
for Sunday, October 5, 2008
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Meteorites From Inner Solar System Match Up To Earth's Platinum Standard (October 4, 2008) -- Some of the world's rarest and most precious metals, including platinum and iridium, could owe their presence in the Earth's crust to iron and stony-iron meteorites, fragments of a large number of asteroids that underwent significant geological processing in the early Solar System. ... > full story
Gas From The Past Gives Scientists New Insights Into Climate And The Oceans (October 4, 2008) -- In recent years, public discussion of climate change has included concerns that increased levels of carbon dioxide will contribute to global warming, which in turn may change the circulation in the Earth's oceans, with potentially disastrous consequences. Ice core and ocean deposit comparisons show complex links between carbon dioxide levels, ocean currents and climate, which may help explain past, present and future climate trends. ... > full story
Discovery Of Natural Compounds That Could Slow Blood Vessel Growth (October 4, 2008) -- Using computer models and live cell experiments, biomedical engineers have discovered more than 100 human protein fragments that can slow or stop the growth of cells that make up new blood vessels. ... > full story
Navy Confirms Sunken Submarine Is Grunion (October 4, 2008) -- A sunken vessel discovered off the coast of the Aleutian Islands is in fact the World War II submarine USS Grunion (SS 216). The submarine Grunion arrived at Pearl Harbor on June 20, 1942. ... > full story
Obesity Clue: Newly Identified Cells Make Fat (October 4, 2008) -- The discovery of an important fat precursor cell may explain how changes in the numbers of fat cells might increase and lead to obesity. ... > full story
Arctic Sea Ice Annual Freeze-up Underway (October 4, 2008) -- After reaching the second-lowest extent ever recorded last month, sea ice in the Arctic has begun to refreeze in the face of autumn temperatures, closing both the Northern Sea Route and the direct route through the Northwest Passage. ... > full story
Traits Produced By Melanin May Signal The Bearer's Capacity To Combat Free Radicals (October 4, 2008) -- Some animal species have developed conspicuous traits produced by melanin pigments (for instance, dark manes in lions, black stripes in some birds and fishes). These traits are used as signals during contests for resources and/or contribute to increase the mating opportunities. However, the efficiency of these traits as signals depends on the fact that they transmit honest information about the quality of the bearer. Scientists have now proposed a novel hypothesis suggesting that melanin-produced traits could indicate the ability of the bearer in fighting free radicals and oxidative damage. ... > full story
Tiny Dust Particles From Sahara Could Help Scientists Study Climate Change (October 4, 2008) -- Scientists in Spain have discovered and characterized a new type of atmospheric aerosols named "iberulites," which could be useful for the study of relevant atmospheric reactions from Earth. The researchers have been carrying out weekly samples collecting atmospheric dust since 1999, and they have determined through satellite images the route followed by these particles in their atmospheric journey. ... > full story
Artificial Cells: Models Of Eel Cells Suggest Electrifying Possibilities (October 3, 2008) -- Researchers have applied modern engineering design tools to one of the basic units of life. They say that artificial cells could be built that not only replicate the electrical behavior of electric eel cells but in fact improve on them, possibly driving future implantable medical devices. ... > full story
Small Fly Has Receptor For Painful Heat (October 3, 2008) -- Scientists have found that a small fly, drosophila, has a receptor for noxious heat. ... > full story
Don't Stress! Bacterial Cell's 'Crisis Command Center' Revealed (October 3, 2008) -- A bacterial cell's 'crisis command center' has been observed for the first time swinging into action to protect the cell from external stress and danger, according to new research. ... > full story
Epstein-Barr Virus Protein Contributes To Cancer (October 3, 2008) -- Researchers have shown that the EBNA1 protein of Epstein-Barr virus (EBV) disrupts structures in the nucleus of nasopharyngeal carcinoma (NPC) cells, thereby interfering with cellular processes that normally prevent cancer development. The study, published in PLoS Pathogens, describes a novel mechanism by which viral proteins contribute to carcinogenesis. ... > full story
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