Measuring animal intelligence is tricky. As humans, we can only compare the smarts of other creatures with our own — an inherently biased benchmark.
"Asking which species is smarter is like asking if a hammer is a better tool than a screwdriver," Brian Hare, founder and director of Duke University's Canine Cognition Center, told PBS in 2018. "Each tool is designed for a specific problem, so of course it depends on the problem we are trying to solve."
