Investigadores de la Universidad Estatal de Oregón han desarrollado un modelo que explica cómo las lagartijas, asà como arañas y algunos insectos, pueden subir y bajar paredes, aferrarse a los techos y aparentemente desafiar la gravedad con mucha gracia y sin esfuerzo.
Esta capacidad, explicada hoy en el Journal of Applied Physics, se debe a un mecanismo notable en los dedos de los pies de las lagartijas que utiliza diminutos ...
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After reporting the country's first domestically acquired case of dengue fever in nearly 70 years yesterday, Japan's health ministry today confirmed finding two more patients. The initial patient, a girl in her teens, had a sudden onset of high fever on 20 August and was hospitalized in Saitama City, near Tokyo. Hospital staff, suspecting dengue, on 26 August sent blood samples to the National Institute of Infectious Diseases in Tokyo, which confirmed the diagnosis.
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In California's Death Valley, a geological phenomenon exists. Sailing stones, or moving rocks can be observed on the valley floor inscribing long trails on the ground without human or animal intervention. For over 60 years of observations, no one has been able to uncover the mystery of what is actually pushing these stones across the sand. That is, until now.
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Roads make it possible to bring goods to market, to get to the office, to log a forest, to hunt its wildlife. Without roads, human society as we know it could not exist. However, to build roads, trees must be cleared and swamps drained, shrinking valuable wildlife habitat and fragmenting populations in the process. A new study, published today in Nature, unveils an innovative map that defines which areas of the world would best be used to build roads – and which should be left alone. Scientists estimate more than 25 million kilometers of new roads will be built worldwide by 2050, representing a 60 percent increase over 2010 numbers. Many of these are slated for environmentally valuable places with high numbers of unique species and pristine forest, such as the Amazon Basin.
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As monarch butterflies are beginning their epic migration from Canada and the U.S. to Mexico for the winter, concerns about the drastic rate at which they're disappearing from the landscape have led environmental and health organizations to petition the government for federal protection.
This week, the Center for Biological Diversity, Center for Food Safety, Xerces Society and monarch scientist Dr. Lincoln Brower filed a legal petition with the U.S. Fish and Wildlife Service seeking protection for monarchs under the Endangered Species Act.
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