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Startling sounds from 6,000-year-old shells hint at their ancient use

Oddly shaped conch shells found at Neolithic archaeological sites dating back 6,000 years could have served as technology for producing an extremely loud noise, scientists have discovered. The tests ...
San Diego Union-Tribune

Sonic boom heard over Washington is a rare sound with a rich history

NORFOLK, Va.NORFOLK, Va. — People living in and around the nation’s capital experienced a rare, if startling, sound that has a rich history in American aviation and possibly a muted future: A sonic ...