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By Ken Cheng. Ken Cheng, PhD, is professor of biological sciences at Macquarie University, Sydney, Australia. Why do dogs get separation anxiety?. Can a chimpanzee recognize itself in a mirror?. Do animals actually have emotions, or are humans simply anthropomorphizing them?.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.