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Securing large crowds a 'vexing problem'

Late Monday, an explosion at the end of an Ariana Grande concert at Manchester Arena in England killed 22 people and injured nearly 60 others. The New York Times reported Tuesday that British authorities had identified the ...

dateMay 24, 2017 in Security
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Is there a green awakening in China?

Heavy air pollution has led to increased environmental consciousness in China. A growing number of apps now allow people to check local air quality. Apps also serve as tools for political activism.

dateMay 23, 2017 in Environment
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Image: Alert, Canada

This Sentinel-1 radar composite image takes us to the northeastern tip of Ellesmere Island (lower-left), where the Nares Strait opens up into the Lincoln Sea in the Canadian Arctic.

dateMar 31, 2017 in Earth Sciences
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