Before reciting the oath of allegiance before a judge, aspiring U.S. citizens must pass an oral civics test. The test ...

By looking at the shifting of stars in photos from the New Horizons probe, astronomers have calculated its position in the ...

Areas found by the EPA to have the highest potential for elevated radon levels are primarily in the northern half of the U.S.

The research reveals the chilling truth about the impact of nuclear tests across the U.S., painting a picture of widespread ...

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