When the U.S. Constitution was ratified, Congress was granted power to establish post offices and mail routes — many along ...

A fossil misidentified for over a century is now reshaping what scientists know about how life first made the leap from sea ...

The one government agency that still reaches nearly every American daily -- undeterred by rain, sleet, snow or even gloom of ...

The U.S. Postal Service is turning 250. Saturday’s anniversary comes as the agency faces financial challenges.

The definition of modified adjusted gross income differs depending on how the calculation is used.

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