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EurekAlert! - Breaking News
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The premier online source for science news since 1996. A service of the American Association for the Advancement of Science.
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Lightweight and long-legged males go the distance for sex
Giant weta females are twice the size of males. Radiotracking the insects showed that males travel more than 90 meters each night in search of a mate, favoring small, long-legged males who walked further and acquired more mates. It suggests that sexual selection for smaller, more mobile males could be responsible for some of the impressive sexual difference in body size in this species and may explain other species where males are smaller than females.
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Old sheep raising the baaa
Researchers show how sheep on a remote island off the west coast of Scotland respond to two consequences of climate change: altered food availability and the unpredictability of winter storms. When times are good, lambs contribute almost twice as much to population size. The oldest sheep contribute most to population growth when conditions are harsh. New mathematical breakthroughs have made it possible to learn how individuals affect population dynamics in rapidly changing environments.
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Creating lung cancer risk models for specific populations refines prediction
Lung cancer risk prediction models are enhanced by taking into account risk factors by race and by measuring DNA repair capacity, according to research teams led by epidemiologists at the University of Texas M. D. Anderson Cancer Center in two complementary papers appearing in the September issue of Cancer Prevention Research.
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Tracking the reasons many girls avoid science and math
New research by a team that includes vocational psychologists at the University of Wisconsin-Milwaukee indicates that the self-confidence instilled by parents and teachers is more important for young girls learning math and science than their initial interest. The three-year, NSF-funded study aimed to identify supports and barriers that steer girls and young women toward or away from science and math during their education.
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Best way to treat malaria: Avoid using same drug for everyone, scientists say
A team of scientists employing a sophisticated computer model pioneered at Princeton University and Resources for the Future has found that many governments worldwide are recommending the wrong kind of malaria treatment.
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