Catálogo de publicaciones - revistas

<jats:p> A <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://www.sciencemag.org/feature/data/books/brl5970.dtl">listing of books received</jats:ext-link> at <jats:italic>Science</jats:italic> during the week ended 26 February 2010. </jats:p>

<jats:p>Investment in scalable, non–price-based behavioral interventions and research may prove valuable in improving energy efficiency.</jats:p>

<jats:p>Dating the establishment of Earth's magnetic field has implications for identifying conditions when life could take hold.</jats:p>

<jats:p>Decades-long field studies require unusual dedication but provide unique insight into animal behavior and ecology.</jats:p>

<jats:p>Fusion power is a step closer with the demonstration of control over the extreme thermal radiation pressure created by high-power laser beams within a cavity.</jats:p>

<jats:p>A protein whose expression is turned on by stress delays the onset of age-related pathologies.</jats:p>

<jats:p>Ship and satellite data help to elucidate how methane emissions from sources such as wetlands may change in a warming climate.</jats:p>

<jats:p>The mechanism of calcium signaling in astrocytes is part of the debate on the role of glia at neuronal synapses.</jats:p>

<jats:title>The Fall of the Dinosaurs</jats:title> <jats:p> According to the fossil record, the rule of dinosaurs came to an abrupt end ∼65 million years ago, when all nonavian dinosaurs and flying reptiles disappeared. Several possible mechanisms have been suggested for this mass extinction, including a large asteroid impact and major flood volcanism. <jats:bold> Schulte <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="1214" related-article-type="in-this-issue" vol="327" xlink:href="10.1126/science.1177265">1214</jats:related-article> ) review how the occurrence and global distribution of a global iridium-rich deposit and impact ejecta support the hypothesis that a single asteroid impact at Chicxulub, Mexico, triggered the extinction event. Such an impact would have instantly caused devastating shock waves, a large heat pulse, and tsunamis around the globe. Moreover, the release of high quantities of dust, debris, and gases would have resulted in a prolonged cooling of Earth's surface, low light levels, and ocean acidification that would have decimated primary producers including phytoplankton and algae, as well as those species reliant upon them. </jats:p>

<jats:title>Dropping a Notch</jats:title> <jats:p> Between 2000 and 2001, the concentration of water vapor in the stratosphere dropped by about 10%. Water vapor is an important greenhouse gas, so did the decrease affect climate and slow global warming? <jats:bold> Solomon <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="1219" related-article-type="in-this-issue" vol="327" xlink:href="10.1126/science.1182488">1219</jats:related-article> , published online 28 January) used a combination of data and models to show that lower stratospheric water vapor probably has contributed to the flattening of global average temperatures since 2000, by acting to slow the rate of warming by about 25%. Furthermore, the amount of water vapor in the stratosphere probably increased between 1980 and 2000, a period of more rapid warming, suggesting how important the concentration of stratospheric water vapor might be to climate. </jats:p>