Back in 2002, when Alexandra Horowitz was working toward her PhD at the University of California at San Diego, she believed that dogs were a worthy thing to study. But her dissertation committee, which favored apes and monkeys, needed convincing.
Oh, how things can change in just two decades, especially in a nation that includes about 90 million dogs among its residents — everything from beloved pets to working dogs doing all kinds of tasks, from sniffing out drugs in airports to assisting blind people with crossing a street.
