Tag: secrets

Better fiddling through chemistry

The mystery of a Stradivarius’s extraordinary sound has been solved, and it all comes down to the chemicals used to treat the wood, probably to ward off worms. The unique acoustical results were most likely a happy accident.

Not just lemon juice

Two Michigan State University researchers have unlocked the secret invisible-ink formula used by the former East Germany secret police, the Stasi: The Stasi’s technique of transferring top-secret messages worked like a piece of carbon paper. An agent would place a piece of paper impregnated with the chemical cerium oxalate between two pieces of plain paper. …

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