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Lithotripsy. The direction of a sound pulse crushes the stones into smaller fragments that can be pa
When the United States gets stuck over a controversial issue—usually something a divided Congress ca
In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai
Conventional oil reserves have passed peak production
The study of how traits such as flower color are passed from generation to generation provided the m
The first pioneer species arrived less than a decade after the eruption.