For many of us, our dogs are our constant companions. Whether collie or retriever, purebred or mutt, dogs climb mountains with us, travel on airplanes with us, and eat the scraps off our plate.
And as we get older, so do they. In fact, dogs experience a lot of the same age-related changes that humans do, from greying hair and creaky joints to more serious conditions like cancer or cognitive decline. Today, scientists are learning how comparing different dog breeds can give us new insights into the aging process — for both our canine companions and their owners.
