NPR's Ari Shapiro speaks with John Conkling, pyrotechnics specialist and professor emeritus of chemistry from Washington College, about how firework sounds are designed. The Fourth of July is of ...
If you could sink through the Earth’s crust, you might hear, with a carefully tuned ear, a cacophany of booms and crackles along the way. The fissures, pores, and defects running through rocks are ...
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