2014 NASA Centennial Challenges Sample Return Robot Challenge

by NASA/Joel Kowsky

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Free for any use, commercial included. No attribution required — though the photographer would not mind it.

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Armstrong, flight, research

Lauren Hughes · 1280×853

Usa, washington

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Coloredwires, computer, cutwhitewires

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Chicago, hotbrightday, illinois

Wonderlane · 793×1024

The Fountains of Bellagio. Las Vegas.

Bernard Spragg · 1024×638

Library and reading room, New Ocean House, Swampscott, Mass (78061)

Tichnor Bros. Inc., Boston, Mass. · 3364×2154

Another Rockaway Sunset

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By the River

romainguy · 1024×640

Fall, river, massachusetts

Internet Archive Book Images · 2992×2008

Alcatraz Island

Bernard Spragg · 1024×561

Capecod, chatham, harwich

U. S. Fish and Wildlife Service - Northeast Region · 1024×768

Abstractsunlight, abstractwater, bluewater

Wonderlane · 1024×576