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Added on the 20/04/2016 21:33:48 - Copyright : Eyewitness Video Online
NASA's release of videos in 4K resolution come as the agency launches a new "ultra high-definition" television service
An animation by NASA shows change in Arctic Sea ice cover
An animation by NASA shows change in Arctic Sea ice cover
Aurora brightens the sky over Earth, captured by NASA astronaut Jeff Williams
Aurora brightens the sky over Earth, captured by NASA astronaut Jeff Williams
Supporters of Zambian President Lungu hold a rally in Lusaka during a tense presidential race, which has been marked by clashes between rival supporters. The presidential election will take place on Thursday. IMAGES.
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