Unusual snow kills 4, brings much of Spain to a standstill

A persistent blizzard blanketed large parts of Spain with an unusual amount of snow on Saturday, killing at least four people and leaving thousands trapped in cars or at train stations and airports that suspended all services.

K9 chemistry: A safer way to train detection dogs

Trained dogs are incredible chemical sensors, far better at detecting explosives, narcotics and other substances than even the most advanced technological device. But one challenge is that dogs have to be trained, and training ...

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