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<jats:p>In science news around the world this week, a dengue vaccine shows promise, a U.S. court says stem cells are drugs, a fracking report is under scrutiny, Germany's National Academy of Sciences Leopoldina has come down firmly against the use of crops for energy, and a Senate panel last week approved a bill that would ban invasive research on great apes in the United States.</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/337/6094/506.1.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/337/6094/506.2.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/337/6094/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/337/6094/507.1.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/337/6094/507.2.summary">Newsmakers</jats:ext-link> </jats:p> </jats:list-item> </jats:list> </jats:p>

<jats:p>This week's Newsmaker is paleobotanist Kirk Johnson, who was named the new director of the Smithsonian Institution National Museum of Natural History.</jats:p>

<jats:p> The world's largest telescope to observe the highest energy photons from space saw its first light in Namibia last week. An orchid called <jats:italic>Acampe rigida</jats:italic> seems to be the first discovered that depends on rain to pollinate its flowers. And this week's numbers quantify HIV-infected U.S. men who have sex with men, low-income countries that will become middle-income by 2020, and the speed of cheetahs and ducks. </jats:p>

<jats:p>The 19th International AIDS Conference, held in Washington, D.C., from 22 to 27 July, marked the meeting's return to the United States for the first time in 22 years.</jats:p>