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| March 19th, 2016Our pet dogs can be trained to detect diseases in people—and they're amazingly good at it. https://t.co/uZ3yIIp7T6
— National Geographic (@NatGeo) March 19, 2016
Our pet dogs can be trained to detect diseases in people—and they're amazingly good at it. https://t.co/uZ3yIIp7T6
— National Geographic (@NatGeo) March 19, 2016