Solving the knotty question of soft-pretzel aroma

Whether at Oktoberfest, the movie theater or a shopping mall, the enticing aroma of soft pretzels is unmistakable. Now, researchers have identified the key compounds that give these twisted knots their distinctive scent. ...

Researchers hope a 'robo-nose' could give K-9 officers a break

Every day, thousands of trained K9 dogs sniff out narcotics, explosives and missing people across the United States. These dogs are invaluable for security, but they're also very expensive and they can get tired.

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