Word: provenances
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...approach also reflects what aides describe as McCain's increasing personal frustration with the press. He is aggravated, aides say, by what he calls the mainstream media's favoritism of Barack Obama - proven, he contends, by the volume and tone of coverage that the Democratic nominee receives. McCain also feels that his inquisitors are consumed with the pursuit of frivolous "gotcha" questions. In two of his last open sessions with reporters this summer, McCain fumbled on answers about federal subsidies for Viagra and contraception, and whether he approved one of his campaign messages. Neither question sought answers to significant issues...
...Detroiters are happy, Barack Obama's campaign is thrilled. The Democratic nominee called on Kilpatrick yesterday to resign, saying through a campaign spokesman that "Mayor Kilpatrick's ongoing troubles and the serious charges against him have been a distraction that the city cannot afford." They have also proven to be a distraction Obama could not afford in a state that may be one of the nation's closest contests in November. Kilpatrick's very public troubles have angered many of the white suburban voters that Obama needs to win over. From an inauguration that was celebrated with official "club crawls...
...Maionica and Kauffman guilty pleas suggest that evidence may be as potent as he suggests. Then again, Duran and Wanseele might be risking a trial partly because they know Mulvihill also charged Fidel Castro in the late 1980s with aiding Colombian drug traffickers, an accusation that was never proven. Either way, Chavez and the U.S. may both face more scrutiny this month than either bargained...
...first step results in a primitive and highly versatile cell. This intermediary is then guided to mature into whatever cell type scientists want. That guiding process has proven difficult to do efficiently, especially for creating insulin-producing cells, Gearhart noted...
...more molecular side, newer genetic and biochemical tests for age are not proving as robust as scientists had hoped. The most exciting method, in which researchers measure the length of telomeres, or the string of DNA at the ends of chromosomes, has proven too unreliable. Just a few years ago, genetic experts had thought that aging cells had shorter telomeres, but it turns out that these bits of DNA can get snipped off even in relatively young cells. "We all age at different rates at the molecular level," says Sinclair...