Science and technology

This Aug. 9, 2015 self-portrait shows Michele Saltzman of Bedford, Mass., and Lucas, a 10-year-old beagle she adopted in October, 2014, from a shelter in Vermont. Because Lucas has a heart murmur and fainting spells, she went online and bought a PetPace health collar, which immediately notifies her about any changes in Lucas' vital signs. A wearable collar can tell an owner when a dog is in pain, something even the dog is sometimes not able to do. It’s just what Saltzman needed for Lucas.(Michele Saltzman via AP)

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