Catálogo de publicaciones - revistas

<jats:p> Hoffmann <jats:italic>et al</jats:italic> . (Reports, 23 February 2018, p. 912) report the discovery of parietal art older than 64,800 years and attributed to Neanderthals, at least 25 millennia before the oldest parietal art ever found. Instead, critical evaluation of their geochronological data seems to provide stronger support for an age of 47,000 years, which is much more consistent with the archaeological background in hand. </jats:p>

<jats:title>Analyzing the drug abuse epidemic</jats:title> <jats:p> There is a developing drug epidemic in the United States. Jalal <jats:italic>et al.</jats:italic> analyzed nearly 600,000 unintentional drug overdoses over a 38-year period. Although the overall mortality rate closely followed an exponential growth curve, the pattern itself is a composite of several underlying subepidemics of different drugs. Geographic hotspots have developed over time, as well as drug-specific demographic differences. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <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.aau1184">eaau1184</jats:related-article> </jats:p>

<jats:title>The road ahead for perovskites</jats:title> <jats:p> The high power conversion efficiencies of small-area perovskite solar cells (PSCs) have driven interest in the development of commercial devices. Rong <jats:italic>et al.</jats:italic> review recent progress in addressing stability, how to allow mass production, and how to maintain uniformity of large-area films. They note that lifetimes exceeding 10,000 hours under 1 sun (1 kW/m <jats:sup>2</jats:sup> ) illumination have been reported for printable triple mesoscopic PSCs. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <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.aat8235">eaat8235</jats:related-article> </jats:p>

<jats:title>How birds change their stripes</jats:title> <jats:p> From stripes to spots, animals often exhibit periodic coloration. Discrete embryonic domains (prepatterns) precede the periodic feather patterns observed in birds. After documenting natural variation in the striped pattern of galliform birds, Haupaix <jats:italic>et al.</jats:italic> performed long-term skin grafts to transfer the pattern of one species to another (see the Perspective by Prud'homme and Gompel). This approach revealed that periodic stripe formation obeys developmental landmarks upstream of local refining mechanisms. The somitic mesoderm first instructs stripe position through the early expression of the pigmentation gene <jats:italic>agouti</jats:italic> , which then controls stripe width by modulating pigment production in a dose-dependent manner. Thus, during feather patterning, a two-step process is at play. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <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.aar4777">eaar4777</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6408" page="1202" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aau5103">1202</jats:related-article> </jats:p>

<jats:p> We have a problem in the academy. According to an extensive meta-analysis cited by the U.S. National Academies in their 2018 report <jats:italic>Sexual Harassment of Women: Climate, Culture, and Consequences in Academic Sciences, Engineering, and Medicine</jats:italic> , more than 50% of women faculty and staff at academic institutions in the United States report having been sexually harassed—as do some 20 to 50% of women students, depending on their field and level of study. </jats:p>

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

<jats:p>Cochrane is in turmoil after ousting co-founder Peter Gøtzsche, who accused it of becoming "industry-friendly."</jats:p>

<jats:p>Small clinical trial revives hope for an alternative to bulky breathing machines.</jats:p>