Catálogo de publicaciones - revistas

<jats:title>The curious tale of the square tail</jats:title><jats:p>Appendages in animals are typically round, but the seahorse tail has a square cross section. Porter<jats:italic>et al.</jats:italic>hypothesize that this shape provides better functionality and strength than a round cross section (see the Perspective by Ashley-Ross). Three-dimensional printed models show that square cross section shapes behave more advantageously when subjected to compressive forces. By allowing greater deformation without damage and accommodating twisting deformations, square appendages passively return to their original configurations. The added flexibility of the square cross section enhances the tail's ability to grasp objects.</jats:p><jats:p><jats:italic>Science</jats:italic>, this issue<jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" related-article-type="in-this-issue" xlink:href="10.1126/science.aaa6683">10.1126/science.aaa6683</jats:related-article>; see also p.<jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6243" page="30" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aab1508">30</jats:related-article></jats:p>

<jats:title>Carbon emissions and their ocean impacts</jats:title> <jats:p> Anthropogenic CO <jats:sub>2</jats:sub> emissions directly affect atmospheric chemistry but also have a strong influence on the oceans. Gattuso <jats:italic>et al.</jats:italic> review how the physics, chemistry, and ecology of the oceans might be affected based on two CO <jats:sub>2</jats:sub> emission trajectories: one business as usual and one with aggressive reductions. Ocean warming, acidification, sea-level rise, and the expansion of oxygen minimum zones will continue to have distinct impacts on marine communities and ecosystems. The path that humanity takes regarding CO <jats:sub>2</jats:sub> emissions will largely determine the severity of these phenomena. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" related-article-type="in-this-issue" xlink:href="10.1126/science.aac4722">10.1126/science.aac4722</jats:related-article> </jats:p>

<jats:p> In the history of humankind, there is a dearth of examples of global threats so far-reaching in their impact, so dire in their consequences, and considered so likely to occur that they have engaged all nations in risk mitigation. But now with climate change, we face a slowly escalating but long-enduring global threat to food supplies, health, ecosystem services, and the general viability of the planet to support a population of more than 7 billion people. The projected costs of addressing the problem grow with every year that we delay confronting it. In recognition of the shared risks we face and the collective action that will be necessary, an international meeting of stakeholders will convene in Paris next week ( <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://www.commonfuture-paris2015.org">www.commonfuture-paris2015.org</jats:ext-link> ), ahead of the United Nations Climate Change Conference (COP21) in December, to discuss solutions for both climate mitigation and adaptation. </jats:p>

<jats:p>A roundup of weekly science policy and related news.</jats:p>

<jats:p> A rare record of ancient culture, left by early <jats:italic>Homo sapiens</jats:italic> in a South African cave, is at risk. </jats:p>

<jats:p>House and Senate also want to resurrect canceled National Children's Study.</jats:p>

<jats:p>Chinese-American specialist on oil industry had run afoul of China's secrecy laws.</jats:p>

<jats:p>New surveys shoot celestial “movies” on a tight budget.</jats:p>

<jats:p>Ideology is just one factor shaping views on science issues.</jats:p>

<jats:p>Pandemrix may have caused autoimmune reactions.</jats:p>