Satellite quantum communication circles closer
A trick used in 3D-movie theatres could enable totally secure quantum communication with satellites
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Climate data shows global warming undeniable
A combination of the National Oceanic and Atmospheric Administration (NOAA) images show September Arctic sea ice in 1979, the first year these data were available, and 2009 in this image from a report released on July 28, 2010. The areas of ice coverage range from 15 percent coverage (darker shades of medium blue) to complete coverage (lightest blue).
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South Americans try to end Venezuela-Colombia rift
South American foreign ministers meet in Ecuador on Thursday to discuss broken ties between Venezuela and Colombia, with sparks likely over the two Andean nations' clashing plans to fix a crisis over leftist rebels.
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