Failure of DNA repair mechanism precedes final stage of deadly leukemia, new Penn study shows
...e was linked to the protein ATR and measured using comet assays. "If blocking DNA repair proves to be the cause of blast crisis, then we may be able to prevent CML from progressing to its final stage by interrupting the action of cancer gene BCR/ABL," said Carroll. "Ultimately, this could lead to a long-t...Comets spread Earth-life around galaxy, say scientists
...arts of the Galaxy. The "splash-back" from a large comet impact could throw material containing micro-organisms out of the planet's atmosphere, suggest scientists from Cardiff University Centre for Astrobiology. Although some of this outflowing material might become sterilised by heat and radiation, they b...Astronomers unravel a mystery of the Dark Ages
...failures and summer frosts some 1,500 years ago a comet colliding with Earth. The team has been studying e...Physics and Astronomy believe this was caused by a comet hitting the earth and exploding in the upper atmosphere. The debris from this giant explosion was su...The Rosetta space probe's long trek to Comet 67P/Churyumov-Gerasimenko
...ce, Hungary, Ireland, Italy and Great Britain. The comet explorer carries ten scientific instruments. Their...ance to be there, at first hand, so to speak, as a comet comes to life," Schwehm goes on to explain. When Churyumov-Gerasimenko gets to within about 500 mill...Bacteria discoveries could resemble Mars, other planets
..., within a moon of Jupiter or Saturn, or even on a comet containing ice crystals that gets warmed up when the comet passes by the sun." Water is a key ingredient, so one key to finding life on other planets is deter...New evidence says Earths greatest extinction caused by ancient meteorite
...strial gases, which again hinted at a meteorite or comet strike. These results, however, were disputed by some researchers. Coming at the problem from another angle, Basu and Poreda separated out the magnetic particles from the samples from Graphite Peak and from a source of P/T strata in Meishan, China, a...Princeton paleontologist produces evidence for new theory on dinosaur extinction
...tem to the breaking point. Although an asteroid or comet probably struck Earth at the time of the dinosaur extinction, it most likely was, as Keller says, "the straw that broke the camel's back" and not the sole cause. Perhaps more controversially, Keller and colleagues contend that the "straw" -- that fi...High-speed images show how cells mobilize for immune response
...ontrast, Petty's images resemble the movement of a comet across the night sky. In the study reported in PNAS, Petty used leucocytes as a model for the process. The amino acid sequence is in the region of the gene FcyRIIA. He is currently studying the same phenomena in the eye, where phagocytosis dispose...Cosmic impacts implicated in both the rise and fall of dinosaurs
...common in space objects, creates a time marker for comet or asteroid impacts." said Kent. "Correlating the ... research adds to the speculation that there was a comet or asteroid impact about 200 million years ago, followed relatively quickly by the rising dominance ...Ocean ecosystems only altered following two great mass extinctions
...vels of dissolved CO2 in the oceans triggered by a comet or meteorite impact. (Inclusions in Permian rocks containing gases known only to exist in outer space were discovered only last year.) The Cretaceous extinction, also triggered by a large impact, was not as thorough, but is the one we are all familia...Impact events' kinetic energy may be key to understanding the severity of mass extinctions
The kinetic energy created by asteroid and comet impacts with the Earth may be key to linking some impacts with mass extinction events. Michael Lucas, a geology student at Florida Gulf Coast University, believes that the severity of four extinction events during the Mesozoic and Cenozoic can be cor...UNC geologist, students to unveil 221 million-year-old top N.C. fossil
...nge or a global catastrophe such as an asteroid or comet impact. Dinosaurs then got bigger, dominated mammals and went extinct themselves about 65 million years ago. Because it has not been published, Carter cannot disclose the proposed scientific name of the new reptile. He said it will be named to honor...Crater makes an impact on three sessions at GSA
...s. Its bigger and deeper than we imagined: This comet or asteroid shot through the Earths atmosphere, leaving a vacuum in its wake. Then it hit, splashing through several hundred feet of ocean and slicing through several thousand feet of coastal plain sediments, says Powars. It fractured the crystalli...Krauss book explores universe from oxygen atom's perspective
...rnova explosion and finds its way to a comet. That comet seeds another planet with the elements for growing life, only to have another asteroid destroy the emerging ecosystem. Spewed into space again, the atom wanders throughout the Milky Way galaxy for eons before it once again finds itself swept up in a...Simulating a high-velocity comet collision with Earth, a team of scientists has shown that organic molecules hitchhiking aboard a comet could have survived such an impact and seeded life on this planet. The results give credence to the...UW astrobiology research gets huge boost from $4.9 million NASA award
...w often planets lose their habitability because of comet or asteroid impacts or other factors that trigger mass extinctions. * Challenges faced by single-cell life evolving to more complex forms, and how that is accomplished. Grant money will be spread among a dozen researchers. Most are at the UW and are ...Stowaways from space provide link between impact, biggest extinction in Earth history
An asteroid or comet similar to the one that wiped out the dinosaurs smacked into Earth 251 million years ago, triggering the biggest extinction in Earth history. The findings by scientists from the University of Washington, University of Rochester, NASA, and New York Un...... into the next, spreading the infection. While the comet tails have been observed and photographed for more than a decade (see http://cmgm.stanford.edu/theriot/movies.htm for movies), two years ago Matthew D. Welch, an assistant professor of molecular and cell biology at UC Berkeley, and his colleagues ...New research proves fullerene can be cosmic carbon carriers
...livered to the surface of planets via asteroid and comet strikes, such as the large impact event that wiped out the dinosaurs 65 million years ago. "This finding opens new possibilities in looking at the problem of how planetary atmospheres evolved and maybe even how life evolved on Earth and perhaps oth......ave illustrated in recent years, a big asteroid or comet impact would in fact produce enormous devastation, huge tidal waves, and a global dust cloud that would block the sun and choke the planet in icy, winter-like conditions for months. Many experts believe such conditions existed on Earth following such...