Catálogo de publicaciones - revistas

<jats:p> <jats:bold>NARA, JAPAN</jats:bold> —The Yangtze region could predate the more politically powerful Yellow River area to the north as both the site of the oldest civilization in China and the earliest cultivation of rice anywhere on Earth, according to preliminary findings by a team of Japanese and Chinese archaeologists. The report comes from the International Symposium on Agriculture and Civilizations, held here last month. </jats:p>

<jats:p>Ecology is supposed to be the most synthetic of the biological disciplines, but in the past few decades, many ecological studies have drifted toward a short-term, small-scale focus. How can the field get back to its roots as a synthetic science, and so answer broad environmental questions? Officials at a new center in Santa Barbara, California, think they can help by examining ecology's big questions—without collecting any new data.</jats:p>

<jats:p> Fluids such as liquids and glasses are not usually thought of as possessing distinct forms or phases. As Poole <jats:italic>et al</jats:italic> . discuss in their Perspective, recent results show that liquids can exhibit “polymorphism”—different phases characterized by different densities. </jats:p>

<jats:p> Chaotic behavior of populations can be described mathematically but has not been observed often in real populations. In a report in this week's issue, Costantino <jats:italic>et al</jats:italic> . ( <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="389" related-article-type="in-this-issue" vol="275" xlink:href="10.1126/science.275.5298.389" xlink:type="simple">p. 389</jats:related-article> ) demonstrate chaotic behavior of a population of flour beetles, both in a predictive model and a real population. In their Perspective, Godfray and Hassell discuss the developments in the field that led to these findings and assess the importance of this first demonstration of chaos in an experimental setting. </jats:p>