Scientists in the UK investigated how a dog's breed, size, sex, and face shape affect lifespan. Flat-faced dogs, large dogs, and male dogs typically live shorter lives, the scientists discovered. Shown here are dog breeds that fall under the lowest 25% for longevity. AdvertisementAs a result, it may explain why the data suggested crossbreeds live shorter lives, McMillan said. Artificial breeding has shortened dogs' livesHuman-led dog breeding has led to new breeds that live shorter lives.

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Persons: Shiba Inus, —, poochies, Bernards, Anita Kot, Presa, Cane Corsos, Cane Corso, Bernard, Kseniya Starkova, Kirsten McMillan, Kirsten McMillian, McMillan Organizations: Lancashire, Service, Dog's Trust, Lakeland, French bulldogs, pugs, Dogs Trust, America Kennel, Westend61 Locations: St