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Beavers leave a trail as they head into the Arctic and reshape the landscape

Beavers leave a trail as they head into the Arctic and reshape the landscape
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A study has provided new evidence of beavers' expansion into the Canadian Arctic by dating the changes they have made to the tundra landscape as they spread northward. Published in the journal Ecosphere, the research combines tree-ring analysis, or dendrochronology, with satellite imagery of surface water to pinpoint the spread of the North American beaver (Castor canadensis) in a remote part of C

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Messier 104, nicknamed the Sombrero Galaxy, is a popular target for amateur observing and astronomical research. Its recognizable extended halo, as well as a faint stellar stream, are captured in exquisite detail in this image from the Department of Energy-fabricated Dark Energy Camera (DECam), mounted on the U.S. National Science Foundation Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory in Chile, a Program of NSF NOIRLab.

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