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<jats:p>Smithsonian Secretary G. Wayne Clough announced he will step down as head of the institution in October 2014.</jats:p>

<jats:p> Follow the links below for a roundup of the week's top stories in science, or <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://www.sciencemag.org/content/341/6153/1434.1.full.pdf">download a PDF of the entire section</jats:ext-link> . <jats:list list-type="bullet"> <jats:list-item> <jats:p> <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://www.sciencemag.org/content/341/6153/1434.2.summary">Around the World</jats:ext-link> </jats:p> </jats:list-item> <jats:list-item> <jats:p> <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://www.sciencemag.org/content/341/6153/findings.full">Findings</jats:ext-link> </jats:p> </jats:list-item> <jats:list-item> <jats:p> <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://www.sciencemag.org/content/341/6153/1435.3.summary">Random Samples</jats:ext-link> </jats:p> </jats:list-item> <jats:list-item> <jats:p> <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://www.sciencemag.org/content/341/6153/1434.3.summary">Newsmakers</jats:ext-link> </jats:p> </jats:list-item> </jats:list> </jats:p>

<jats:p>String theory goes viral in a video by musician and physics master's degree student Tim Blais that parodies Queen's "Bohemian Rhapsody." And, thanks to newly discovered fossils, anthropologists reconstruct Lucy, the 3.2-million-year-old hominin, giving her a new, svelter look.</jats:p>

<jats:p>As the 2013 fiscal year comes to a close in the United States, the impact on science of the 5% federal budget cut known as the sequester is becoming clearer—sort of.</jats:p>

<jats:p>The Obama administration last week unveiled a landmark proposal that would require new coal-fired power plants to capture at least some of the carbon pollution they emit, but the needed technology remains uncertain.</jats:p>

<jats:p>Australia's new government eliminated the science minister post and has begun dismantling climate change programs—and more tremors could follow.</jats:p>

<jats:p> <jats:italic>C. difficile</jats:italic> , a nasty hospital-acquired infection, is on the rise. Genetic sleuths are looking for where it is coming from and what can be done. </jats:p>