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Still a filament arrow?

On May 28, 2015 (above left), the sun, as seen by NASA's Solar Dynamics Observatory, showed a pair of filaments in the form of an arrow. The filaments appeared to remain stable as they rotated around to the ...

dateJun 22, 2015 in Space Exploration
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The math of shark skin

"Sharks are almost perfectly evolved animals. We can learn a lot from studying them," says Emory mathematician Alessandro Veneziani.

dateJul 03, 2015 in Plants & Animals
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