Large bombardments of meteorites approximately four billion years ago could have helped to make the early Earth and Mars more habitable for life by modifying their atmospheres, suggests the results of a paper published today in the journal Geochimica et Cosmochima Acta.
When a meteorite enters a planet's atmosphere, extreme heat causes some of the minerals and organic matter on its outer crust to be released as water and carbon dioxide before it breaks up and hits the ground.
Bethesda, MD (June 1, 2009) – Obesity is an independent predictor of inadequate bowel preparation at colonoscopy, and the presence of additional risk factors further increases the likelihood of a poorly cleansed colon, according to a new study in Clinical Gastroenterology and Hepatology, the official journal of the American Gastroenterological Association (AGA) Institute.
While humans are still struggling to get rid of unwanted carbon it appears that the heavens are really rather good at it. New research by astrophysicists at the University of Warwick has discovered that a mystery stellar explosion recorded in 2006 may have marked the unusual death of an equally unusually carbon-rich star.
PITTSBURGH, May 30 – Patients undergoing treatment for advanced head and neck cancers may respond well to the addition of gefinitib to chemotherapy, according to a study sponsored by the Eastern Cooperative Oncology Group and chaired by Ethan Argiris, M.D., associate professor of medicine, University of Pittsburgh School of Medicine, and co-leader of the Head and Neck Cancer Program of the University of Pittsburgh Cancer Institute (UPCI). The results will be disclosed at the 45th annual meeting of the American Society of Clinical Oncology (ASCO) on May 30 in Orlando, Fla.
A new study shows that a large majority of patients who present with advanced colorectal cancer that has spread to other organs (stage IV) don't require immediate surgery to remove the primary tumor in the colon. Researchers from Memorial Sloan-Kettering Cancer Center (MSKCC) presented their data today at the American Society of Clinical Oncology Annual Meeting.
CHICAGO, IL (May 29, 2009) - A new study is the first to show that there is a previously unrecognized role for environmental pollution in liver disease in the general U.S. adult population. This work builds upon the groups' previous research demonstrating liver disease in highly-exposed chemical workers. The study is being presented during Digestive Disease Week® 2009 (DDW®), the largest international gathering of physicians and researchers in the fields of gastroenterology, hepatology, endoscopy and gastrointestinal surgery.
Chicago, IL (May 29, 2009) – Clinicians, researchers and scientists from around the world will gather for Digestive Disease Week® 2009 (DDW®), the largest and most prestigious gastroenterology meeting, from May 30 to June 4, 2009, at the McCormick Place Convention Center, Chicago, IL. DDW is the annual meeting of the American Gastroenterological Association (AGA) Institute, the largest and oldest GI society in the world. AGA Institute researchers will present exciting, cutting-edge data during the meeting that will help change the way physicians diagnose and treat GI disorders.
Berkeley -- The chance discovery last month of a rare radio supernova - an exploding star seen only at radio wavelengths and undetected by optical or X-ray telescopes - underscores the promise of new, more sensitive radio surveys to find supernovas hidden by gas and dust.
NASA's Chandra X-ray Observatory has found a cosmic "ghost" lurking around a distant supermassive black hole. This is the first detection of such a high-energy apparition, and scientists think it is evidence of a huge eruption produced by the black hole.
Using data from NASA's THEMIS mission, a team of University of Alberta researchers has pinpointed the impact epicenter of an earthbound space storm as it crashes into the atmosphere, and given an advance warning of its arrival.
The team's study reveals that magnetic blast waves can be used to pinpoint and predict the location where space storms dissipate their massive amounts of energy. These storms can dump the equivalent of 50 gigawatts of power, or the output of 10 of the world's largest power stations, into Earth's atmosphere.
The joint Japan-U.S. Suzaku mission is providing new insight into how assemblages of thousands of galaxies pull themselves together. For the first time, Suzaku has detected X-ray-emitting gas at a cluster's outskirts, where a billion-year plunge to the center begins.
"These Suzaku observations are exciting because we can finally see how these structures, the largest bound objects in the universe, grow even more massive," said Matt George, the study's lead author at the University of California, Berkeley.
Using new data from ESA's XMM-Newton spaceborne observatory, astronomers have probed closer than ever to a supermassive black hole lying deep at the core of a distant active galaxy.
The galaxy – known as 1H0707-495 – was observed during four 48-hr-long orbits of XMM-Newton around Earth, starting in January 2008. The black hole at its centre was thought to be partially obscured from view by intervening clouds of gas and dust, but these current observations have revealed the innermost depths of the galaxy.
A Canadian researcher working in the U.K. says doctors, authors and educators are doing hyperactive children a disservice by claiming that hyperactivity as we understand it today has always existed.
Matthew Smith says not only is that notion wrong, it misleads patients, their parents and their physicians. Smith, who is from Edmonton, is finishing up his PhD at the Centre for Medical History at the University of Exeter.
Berkeley -- The chance discovery last month of a rare radio supernova - an exploding star seen only at radio wavelengths and undetected by optical or X-ray telescopes - underscores the promise of new, more sensitive radio surveys to find supernovas hidden by gas and dust.
CORAL GABLES, FL, FL (May 27, 2009)--People have always wondered where we, our Earth, our galaxy, come from. A group of scientist has now driven that quest one step further and taken a peak at how the stars that gave rise to most of the material found on our universe formed over cosmic history.