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<jats:p>Springing back to life from a weakened form of the pathogen used in a vaccine, poliovirus type 2, which had been eradicated in 1999, is causing a runaway outbreak in Nigeria, where types 1 and 3 are also raging.</jats:p>

<jats:p>A damning report from the Government Accountability Office accuses the U.S. Department of Homeland Security of relying on a flawed risk analysis to select Manhattan, Kansas, as the site for its planned $450 million National Bio and Agro-Defense Facility.</jats:p>

<jats:p>With its poor health infrastructure and lack of surveillance, experts fear that Africa—especially south of the Sahara—might be harder hit by the 2009 H1N1 pandemic virus than any other continent.</jats:p>

<jats:p> Highlights from <jats:italic>Science</jats:italic> 's online daily news site, <jats:italic>Science</jats:italic> NOW, this week include a gorilla virus in our midst, confirmation of dinosaur protein fragments, and a way to undo the damage caused by glaucoma and grow new teeth. </jats:p>

<jats:p> An international research team has uncovered compelling evidence that the malaria parasite, <jats:italic>Plasmodium falciparum</jats:italic> , evolved from a relative called <jats:italic>P. reichenowi</jats:italic> that infects chimpanzees. </jats:p>

<jats:p>The phylogenetics community is worried about a patent application that claims the invention of techniques that evolutionary biologists have been using for years to discern how organisms were related to one another through evolutionary time, based on similarities in genetic sequence.</jats:p>

<jats:p> <jats:italic>Science</jats:italic> Insider this week reported on the U.S. plan to vaccinate its citizens this fall against the H1N1 influenza virus, a mistake in manuscript handling that led to an embarrassing use of borrowed text in a recent paper on the use of human embryonic stem cells, and a constrained funding request for the National Institutes of Health, among other stories. </jats:p>

<jats:p>U.S. medical groups are lining up this week against a biotech company in a rare federal court battle over whether a specific drug test can be patented.</jats:p>

<jats:p> If the eukaryote cell hadn't evolved, we wouldn't be here to discuss the question of how it originated. In the eighth essay in <jats:italic>Science</jats:italic> 's series in honor of the Year of Darwin, Carl Zimmer describes one of the most important transitions in the history of life: the origin of cells with a nucleus, which gave rise to every multicellular form of life. </jats:p>

<jats:p>As he prepares to retire, David Leckrone reflects on the rescue effort that kept the observatory in orbit and on the prospects for humans in space.</jats:p>