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In light of eBay security breach, why do passwords persist?

Did flightless birds once rule the skies?

Snooping? Companies do it, too.

Focus

In the end, NSA might not need to snoop so secretly

Election 2012: the beautiful moment

Wednesday's lunar eclipse: How to watch it

#TwitterBlackout: Protests brew as complaints over censorship come to a boil

Can one professor teach 500,000 students at once?

Can the Senate鈥檚 new Republicans usher in NSA surveillance reform?

Why 'Cosmos'? Why now? A Q&A with Neil deGrasse Tyson.