Revenues at America's fixed-line local and long-distance carriers have fallen back since peaking in 2000, and forecasts suggest that revenues will slip further over the next few years partly as VOIP providers grab their business.

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Tagging studies show that the scalloped hammerhead gathers at fixed sites around islands in the Eastern Pacific Ocean during its long-distance migrations.

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This partly reflects the emergence of long-distance telephone plans that no longer charged per minute but rather used a fixed fee.

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One glitch: the first generation smart glasses have fixed focus, low resolution cameras, which require agents to hold up papers at a very specific distance to be correctly scanned.

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