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7,949 articles mezi dny 1.3.2012 a 31.3.2012
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SATURDAY 31. MARCH, 2012
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22:00
Hubble Spies 'UFO' Galaxy
The space telescope photographs a beautiful spiral edge-on and astronomers notice its UFO-like qualities. -
21:54The space telescope photographs a beautiful spiral edge-on and astronomers notice its UFO-like qualities.
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21:24
Asia turns off lights for Earth Hour
Australia's Sydney Harbour Bridge and Opera House were plunged into darkness on Saturday for the annual Earth Hour campaign, leading a global effort to raise awareness about climate change. -
21:19
Commonly used diabetes drug may help to prevent primary liver cancer, study suggests
Metformin, a drug widely used to treat Type 2 diabetes, may help to prevent primary liver cancer, researchers report. The medication, which is derived from the French lilac, is being studied in connection with the prevention of a variety of cancers. This preclinical study is the first to focus on liver cancer.
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21:11The use of metformin in men with prostate cancer before prostatectomy helped to reduce certain metabolic parameters and slow the growth rate of the cancer, according to new research.
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21:11New findings suggest that metformin may protect against oral cancer.
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21:11Metformin, a widely used, well-tolerated drug prescribed for patients with diabetes, may protect against liver cancer, according to a new study.
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21:11Higher oral doses of plain vitamin D raised levels of calcitriol in prostate tissue. Higher prostate levels of calcitriol, a hormone made from vitamin D, corresponded with lower levels of the proliferation marker Ki67 and increased levels of cancer growth-inhibitory microRNAs in prostate cancer cells, according to new data.
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21:03
Uranium Mines Dot Navajo Land, Neglected and Still Perilous
Scientists and Indian advocates question why the government is not acting more quickly on a cleanup.
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20:08Gasoline prices are skyrocketing, as if you haven't noticed. Take a walk down memory lane to the gasoline crisis of 1974.
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19:29Dogs in the workplace reduce stress and boost job satisfaction, finds a unique study.
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19:24Starting with the arrival of Polynesian settlers in the fourth century, and peaking in the mid-1800s, the destructive forces of wildfires and pests and the grazing of feral pigs, goats, and cattle reduced the native forests of Maui, Hawaii, to just a tenth of their original extent. Maui's native vegetation was replaced largely by imported or invasive species. Over time, the invasive grasses that took root reshaped the hydrological properties of the soil, reducing the viability of native plant species that had evolved to thrive under Hawaii's previous hydrological dynamics. Maui's ecosystem had been changed for so long that scientists were uncertain whether the region could actually again support the native flora.
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18:32
Mysterious Animal-Shaped Structures Are Oldest Known
Manmade mounds shaped like orcas, condors and even a duck may be the oldest evidence of animal mounds outside of North America, according to former University of Missouri anthropologist. -
17:32An asteroid the size of a passenger jet will zoom close by Earth on Sunday (April 1) just in time for April Fools' Day, but it has no chance of hitting the Earth, NASA says.
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17:32NASA's chief hopes that Amazon CEO Jeff Bezos has "all the luck in the world" recovering one or more of the engines that launched the first manned moon landing mission from where the dot-com billionaire recently discovered them on the ocean floor.
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17:24To fulfill the need for an ever more accurate and complete understanding of the flow of carbon through the Earth system, a flurry of research has taken place in the past decade on previously overlooked aspects of the carbon cycle. Researchers have investigated the roles of rivers, lakes, and streams in transporting carbon, often with mixed, or only broadly constrained, results. Further, many investigations have traditionally focused on a small number of sites. Though such focused measurements are important for pinning down spatial and temporal changes in the local exchange of carbon, they make expanding the results to broader regions difficult.
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17:10Creating a résumé may seem relatively simple, but you might be surprised by some of the things hiring managers say are big no-no's on résumés. They say they see these mistakes all the time.
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17:08
Wilson of the Antarctic: Forgotten hero
Why one of Scott's team, Dr Edward Wilson, is a forgotten hero -
16:56Teams of surveyors have descended on the area around the Washington Monument in recent weeks to search for any minute changes in ground level wrought by the 5.8 magnitude earthquake that rattled huge swaths of the East Coast last Aug. 23.
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15:59A species of lizard is now extinct from the Hawaiian Islands, making it the latest native vertebrate species to become extirpated from this tropical archipelago. The copper striped blue-tailed skink (Emoia impar) -- a sleek lizard with smooth, polished scales and a long, sky-blue tail -- was last confirmed in the Na'Pali coast of Kauai in the 1960s. But repeated field surveys on Kauai, Oahu, Maui and Hawai'i islands from 1988 to 2008 have yielded no sightings or specimens.
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15:29
Canadians turn off lights for Earth Hour
Many Canadians from coast to coast were powering down Saturday for the sixth Earth Hour, as the organization behind the global campaign expressed hope that the event will keep gaining momentum in years to come.
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15:24Forecasting how plumes of particles, such as radioactive particles from a nuclear disaster, will be transported and dispersed in the atmosphere is an important but computationally challenging task. During the Fukushima nuclear disaster, operational plume forecasts were produced each day, but as the emissions continued, previous emissions were not included in the simulations used for forecasts because it became impractical to rerun the simulations each day from the beginning of the accident.
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15:10When they get sick, bees raid their own "medicine cabinet," researchers have found. Specifically, when infected with fungi, they collect loads of antifungal plant extracts and coat their hives with them.
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15:10Fireflies are a diverse lot. Some flash their lights Morse-code style, some glow more languorously, some synchronize with others around them, and some fly in a distinctive pattern while flashing.
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14:08GLOBARS are an integrated safety option that will light up the urban cyclist's life.
Naposledy aktualizované zdroje
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Guardian Unlimited Science (dnes, 01:07)
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National Geographic News (26. 5, 18:39)
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EurekAlert (26. 5, 06:00)
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ScienceNOW (26. 5, 00:24)
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Sci-Tech Today (25. 5, 23:53)
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TIME (25. 5, 19:50)
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NASA (24. 5, 21:35)
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Technology Review Feed - Tech Review Top Stories (16. 1, 22:07)
