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Intelligence isn’t unique to humans — as the 15 videos of animals solving problems below are about to show you. The animal kingdom is packed with creatures that can solve complex puzzles, use tools, ...

The best avian vocal learners, such as crows and parrots, also tend to be considered the most intelligent birds. So it’s natural to think that the two traits could be linked. But studies with smart ...

One of the ways we try to understand the origins of human intelligence is by looking at its equivalents elsewhere in the animal world. But doing so turns out to be more complicated than it might seem.