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Photos
Piotr Naskrecki
PLOS One via AP
Image: A solar-powered airplane flies from San Francisco Bay
Reuters
Image: A woman walks on a street with her umbrella as an atmospheric phenomenon known as a "sun dog" is seen in the sky over Havana
Reuters
Image:
AP
Zachary Grether
Image: FRANCE-SCIENCES-TECHNOLOGY-INNOROBO
AFP - Getty Images
Image: Musical performance at space station
EPA
Mingzhai Sun and Joshua Shaevitz (Princeton) / Filiz Bunyak and Kannappan Palaniappan (Univ. of Missouri-Columbia)

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