These are the 'smartest' animals on Earthsmart-octopus.jpg

These are the ‘smartest’ animals on Earth

Scientists and enthusiastic dog owners alike have long quibbled about what attributes or tendencies make one animal smarter or more intelligent than another. But as animal researchers have applied various intelligence tests to a wider net of living things in recent years, the dividing lines have only gotten murkier.  Earlier this year, a group of […]

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