Catálogo de publicaciones - revistas

<jats:title>Loss of flight in the Galapagos cormorant</jats:title> <jats:p> Although rare among existing birds, the loss of flight appears to have occurred multiple times in evolutionary history. However, the genetic changes that ground avian species are not well understood. Burga <jats:italic>et al</jats:italic> . sequenced genomes from three cormorant species and compared them with that of the flightless Galapagos cormorant (see the Perspective by Cooper). They identified variants in genes involved in primary ciliogenesis. Functional analyses of these variants suggest that the impaired function of the genes may be responsible for skeletal changes associated with the Galapagos cormorant’s loss of flight. </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" issue="6341" page="eaal3345" related-article-type="in-this-issue" vol="356" xlink:href="10.1126/science.aal3345">eaal3345</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6341" page="904" related-article-type="in-this-issue" vol="356" xlink:href="10.1126/science.aan5199">904</jats:related-article> </jats:p>

<jats:title>The depths of an ancient lake on Mars</jats:title> <jats:p> Gale crater on Mars was once a lake fed by rivers and groundwater. Hurowitz <jats:italic>et al</jats:italic> . analyzed 3.5 years of data from the Curiosity rover’s exploration of Gale crater to determine the chemical conditions in the ancient lake. Close to the surface, there were plenty of oxidizing agents and rocks formed from large, dense grains, whereas the deeper layers had more reducing agents and were formed from finer material. This redox stratification led to very different environments in different layers, which provides evidence for Martian climate change. The results will aid our understanding of where and when Mars was once habitable. </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" issue="6341" page="eaah6849" related-article-type="in-this-issue" vol="356" xlink:href="10.1126/science.aah6849">eaah6849</jats:related-article> </jats:p>

<jats:p>The U.S. president's proposed budget for next fiscal year, released on 23 May, reflects a shortsighted and misinformed understanding of the impact that government investments in science have on the lives of people throughout society, far beyond just those doing research. Thankfully, this document does not determine future government spending; the U.S. Congress, from which substantial bipartisan criticism of the budget has already emerged, establishes this subsequently through the appropriations process. Nonetheless, this budget is an important statement of the priorities of an administration that, despite its bold promises of economic prosperity and American greatness, seems not to grasp fundamental elements underlying decades of prosperity.</jats:p>

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