Top stories: last wild caribou in the lower 48, glowing brains, and ancient fossils under threat

Science | AAAS | 1/18/2019 | Staff
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The last caribou known to inhabit the contiguous United States has been removed from the wild. This week, a team of biologists working for the Canadian province of British Columbia captured the caribou—a female—in the Selkirk Mountains just north of the U.S.-Canada border. They then moved it to a captive rearing pen near Revelstoke as part of a controversial, last-ditch effort to preserve highly endangered herds.

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Expansion microscopy allows scientists to label individual neurons and trace their thinnest tendrils to chart their connections. But the process takes an excruciatingly long time, and it can “burn out” the fluorescent labels. Now, researchers have come up with a new method that can image an entire fly brain in exquisite detail in just 62.5 hours.

Thousands - Fossils - Bears - Ears - National

Thousands of fossils pepper Bears Ears National Monument, a sweep of buttes and badlands in southwestern Utah whose rich paleontological and archaeological record persuaded former President Barack Obama to designate the area a national monument. But in December 2017, President Donald Trump slashed its size by 85%, prompting the typically apolitical Society for Vertebrate Paleontology to sue—along...
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