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Can Mayors Save the World From Climate Change?

BUCASIA BEACH, Australia — Mayor Greg Williamson crunched through the dead branches and kicked the sand. His government had planted trees near the shore to protect this northern Australian beach community from the effects of climate change, but someone had cut them down, apparently for a better view. “It looks …

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In the Sea, Not All Plastic Lasts Forever

A major component of ocean pollution is less devastating and more manageable than usually portrayed, according to a scientific team at the Woods Hole Oceanographic Institution on Cape Cod, Mass., and the Massachusetts Institute of Technology. Previous studies, including one last year by the United Nations Environment Program, have estimated …

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Wiggle, Twitch, Squirm: Watch How Guts Grow

In the grayscale of a laboratory video, the little tubes squirm. They pulse as waves of contraction travel along their length — they almost seem to dance as the squeezing stretches them rhythmically. And, curiously, they grow. These tubes are individual lengths of intestine, taken from a chicken embryo. And …

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A Virus in Koala DNA Shows Evolution in Action

Koalas have been running into hard times. They have suffered for years from habitat destruction, dog attacks, automobile accidents. But that’s only the beginning. They are also plagued by chlamydia and cancers like leukemia and lymphoma, and in researching those problems, scientists have found a natural laboratory in which to …

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