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POPSA Giant Solar Tower Could Power the Future On a sunny day, the air at the top of the tower would be 70 degrees Fahrenheit (20 degrees Celsius), whereas the air in the greenhouse could reach 160 degrees Fahrenheit (70 degrees Celsius). As this hot air escapes up the tower at 34 mph (15 meters per second), it spins 32 turbines that generate up to 200 megawatts of electricity. Even with all this power, the solar tower is less than one tenth as efficient as solar cells in converting the sun's energy into electricity. The advantage for a solar tower is that its materials are much less expensive.
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POPSDebt collectors' lies cause woman to commit suicide Nina Kay MacDermid suffered from bipolar disorder. She opened up three Discover credit card accounts in her husband's name, and went on a manic spending spree. She racked up debt, and after debt collectors falsely threatened her with jail, she shot & killed herself. Caveat emptor has more .
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POPSSacred River of Millennia A small river in Slovenia, has yielded thousands of ancient valuable artifacts, from prehistoric settlers to Romans, Celts and Medieval societies. Apparently, the river had been considered "sacred" by various civilizations for millennia.
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POPSEnergy at your feet Finally, unlike roof-top solar arrays, which some find unattractive, the solar collectors in roads and parking lots would be invisible.” In the lab, small slabs were exposed to halogen lamps, simulating sunlight. Larger slabs were set up outdoors and exposed to more realistic environmental conditions, including direct sunlight and wind. The tests showed that asphalt absorbs a considerable amount of heat and that the highest temperatures are found a few centimeters below the surface. This is where a heat exchanger would be located to extract the maximum amount of energy. Experimenting with various asphalt compositions, they found that the addition of highly conductive aggregates, like quartzite, can significantly increase heat absorption, as can the application of a special paint that reduces reflection.
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POPSVirtual Worlds - Real-World Problems As with any novel technology, virtual worlds bring new opportunities and new problems. The embrace of virtual worlds by companies for mundane uses on the one hand, and by scam artists to get up to no good on the other, points not to the shortcomings of such environments—but to their increasing maturity and potential. “I don't think this is the end to fun and games,” says Mr Kane. “I think it's only the beginning.”
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POPSW. F. Petrie's Egypt discoveries are on exhibit in America Sir William Flinders Petrie is considered as the founder of the modern archaeology and especially, Egyptology. The "Excavating Egypt" exhibit of his discoveries is on display in Santa Fe until Jan. 6, 2008. Then it heads to South Carolina, Florida, California and Kentucky, through mid-June of 2009.
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POPSDinosaur fossil fetish spurs collectors' market the bad news: those who can't afford to keep up with escalating prices are losing out. This includes Britain's museums, whose budgets are pitiful compared to your average Hollywood hotshot or shipping magnate in pursuit of his next palaeontology fix.
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POPSFACES 'Like the earth of a hundred years ago our mind still has its darkest Africas, its unmapped Borneos and Amazon basins. In relation to the fauna of these regions we are not yet zoologists, we are mere naturalists and collectors of specimens. ' Aldous Huxley from 'Heaven and Hell' 1954
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